Rosh Chodesh - 1 Av
The death of tzadikim is compared to the burning of the Beis HaMikdash. Perhaps, that is why there is such an disproportionate amount of tzadikim that were niftar on this day, Rosh Chodesh of the month when the first and second Beis HaMikdash were destroyed, starting with Ahron HaKohen, the "ohev Shalom v'rodef Shalom", which in turn is related to the churban.
1 Av - Ahron HaKohen (1272 B.C.E)
1 Av - Elazar ben Ahron HaKohen
1 Av - R' Yehoshua Heschel ben R' Elazar (died early 1700's) was the Rov of Dubna after R' Yosef Yoska, the Yesod Yosef
1 Av - R' Noson Nota ben R' Yosef of Averitch (1785) Talmid of the Baal Shem Tov and father-in-law of the Bas Ayin. He did not sleep on Shabbos because it says "V'shomru Bnei Yisroel es HaShabbos", you should watch the Shabbos.
1 Av - R' Asher Wallerstein (1837) was the son of R' Aryeh Leib, the Shagas Aryeh,
1 Av - R' Ahron ben R' Moshe Goldstein (1845) was the Rov of Breslov. He was one of the main students of R' Nachman of Breslov. R' Nachman said that he used his ancestral merits to bring R' Ahron to Breslov and that R' Ahron went to his chuppah with a "clean garment". He and R' Naftali were the two witnesses to R' Nachman's famous promise to pull out of Gehinom anyone who gives tzedaka and says Tikun HaKlali by his kever. His son, R' Tzvi Aryeh succeded him and R' Tzvi's son was R' Nachman of Tcherin.
1 Av - R' Shmuel ben R' Dovid Tzvi Ehrenfeld (1883), the Chasan Sofer, grandson of the Chasam Sofer
1 Av - R' Ahron ben R' Chaim Halberstam of Sanz (1903)
1 Av - R' Menachem Nochum of Kobrin-Bialystok (1918) ben R' Yehudah Leib was a talmid muvhak of the Yesod Avodah of Slonim
1 Av - R' Shlomo ben R' Ben-Zion Halberstam of Bobov (2000) His father, first wife and several children were murdered by the Nazis y's. He remarried after the war and rebuilt Bobov into one of the largest chassidish communities in the world. His only son to survive the war, R' Naftal Tzvi, sucseeded him and passed away in 2005. There is a book, Nor the Moon by Night, about his experiences during the Holocaust. It was mentioned many times after his passing that it was no coincidence that his yahrzeit is the same as Ahron HaKohen's because he was the consummate "ohev Shalom v'rodef Shalom" and was loved by all.
2 Av - R' Ahron Teumim HY"D (1690) ben R' Moshe, was the Rov of Kracow. While visiting another region, a Polish nobleman had him arrested for no reason, and placed on a horse to bring him to jail. On the way, he fell off many times and they put him right back on until he died from his wounds.
2 Av - R' Moshe ben R' Avrohom Stern (1997), Debreciner Rov, author of Be'er Moshe. One of the greatest poskim of our time.
3 Av – R' Shimshon ben R' Pesach Ostropolier HY"D See here for more.
3 Av - R' Gedalia Ahron Rabinowitz of Monastrich HY"D (1919) ben R' Yehoshua was killed in a pogrom in Uman with 700 others.
3 Av - R' Dovid Shapira (1934) ben R' Pinchas Leib
3 Av - R' Chaim Yechezkel Taub of Ozorov (1938) ben R' Yisroel of Modzitz
3 Av - R' Yitzchok (1941) ben R' Mordechai Twersky of Skver-Kishinev was the first Skverer Rebbe in America.
3 Av - R' Yehoshua Heschel HaLevi Horowitz HY"D (1943) ben R' Chaim Shmuel was a descendant of the Chozeh of Lublin.
4 Av - R' Menachem Azariah ben Yitzchok Brechya (1620) Rama MiPano
4 Av - R Tzvi Meir HaKohen Rabinowitz, Av Beis Din of Radomsk (1902) His father was the Tiferes Shlomo, R' Shlomo HaKohen of Radomsk
4 Av - R' Ephraim Taub of Kuzmir (1904) ben R' Yechezkel
4 Av - R' Benzion Halberstam HY"D (1941) ben R' Shlomo, Bobover Rebbe, author of Kedushas Tzion.
5 Av - R' Yitzchok ben R' Shlomo Luria Ashkenazi, The Arizal (1572), The Chida said on him that the way he reached such a high level was that Eliyahu HaNavi purified him with ashes of a Parah Adumah. The Arizal is respected and accepted by all the great Rabbonim of the Ashkenazim (chassidim and non-chassidim), Sefardim and Teimanim. Besides Kabbalistic Seforim, the Arizal is very often quoted in halachic works, such as the Magen Avrohom, Be'er Heitiv and Mishna Berura.
5 Av - R' Gedalyah Chiyun (1750), founder of Yeshiva Beis El which studied Kabbalah based on the Arizal
5 Av - R' Chaim of Krasna (1793) talmid of the Baal Shem Tov
5 Av - R' Chaim Ozer Grodzinsky of Vilna (1940) author of Achiezer. One of the Gedolei Hador of his time, he was very close with the Chofetz Chaim. He was a great tzadik and an absolute genius, with a reputation, for among other things, being able to write two separate things at a time using his right and left hand simultaneously.
5 Av - R' Binyomin Paler (2000), talmid of the Brisker Rov, and founder of Yeshiva Bais Hatalmud and Yeshiva Mekor Chaim
5 Av - R' Yechiel Michel Dorfman (2006) One of the leaders of Breslov. Married the granddaughter of R' Avrohom Sternhartz. He used to risk his life to take people to Reb Nachman's tzion in Uman. Spent time in Russian prisons and Siberia. Till the end he had a rigorous schedule of Torah and Avodah. See here for more.
6 Av - R' Yehoshua Greenwald, Av Beis Din of Chust
6 Av - R' Shlomo Zalman Hanau of Frankfurt-on-Main, author of Binyan Shlomo
7 Av - R' Pinchos of Sokolivka HY"D (1919) ben R' Gedalia Ahron of Linitz He was killed by the Ukranians.
7 Av - R' Sholom Noach ben R Moshe Avrohom Brezovsky (2000), Slonimer Rebbe and author of Nesivos Sholom, one of the most popular Chassidishe Seforim of our time. He was a son-in-law of the previous Rebbe, the Birchas Avrohom.
7 Av - R' Moshe Greenwald of Chust, the Arugas Habosem
7 Av - R' Simcha Bunim Ehrenfeld of Mattersdorf
8 Av - R' Simcha Zissel Ziv of Kelm (1898)
9 Av - Reb Yaakov Yitzchok ben Reb Avrohom Eliezer Halevi, the Chozeh of Lublin See here for much more on the Chozeh.
9 Av - Reb Gavriel "Malach" ben Reb Dovid Horowitz of Moglenitza(1858) was a talmid of the Ohev Yisroel of Apta, Magid of Koznitz and his son, Reb Moshe Elyakim Briah and Reb Chaim Meir of Moglenitza. He helped put together the writings of the Magid of Koznitz
9 Av – R' Yitzhak Nisim ben Rachamim, Sephardi Chief Rabbi of Israel (Rishon Letzion) from 1955 to 1972 Rebbe of R' Mordechai Eliyahu
10 Av - Yissachar ben Yaakov Avinu
10 Av - Don Yitzchok Abarbanel (1508)
11 Av - R' Hillel ben R' Meir HaLevi Malisov, best known as Reb Hillel Paritcher (1864) was a talmid of the Bas Ayin, Chenobyler Magid, Miteler Rebbe and Tzemach Tzedek. He was one of the greatest tzadikim in Chabad at the time and was like a Rebbe in his own right. He authored Pelach Harimon, Imrei Noam, Likutei Biurim and Maamar Hishtatchus.
11 Av - R' Yitzchak Blazer of St. Petersburg (1907) was a talmid of R' Yisroel Salanter. He wrote Ohr Yisroel, based on his Rebbe's letters and Pri Yitzchok (1907)
12 Av - R' Aryeh Leib Katzenelbogen (1837) Rov of Vilna
12 Av - R' Moshe Ber ben R' Ahron of Stolin (1847) was a grandson of R' Shlomo of Karlin
12 Av - R' Ephraim Zalman ben R' Menachem Manish Margolies(1886) son-in-law of the Trisker Magid
12 Av - R' Yeshayahu ben R' Avrohom Moshe Veltfried of Kalish (1939)
13 Av - R' Nosson Nota ben R' Shlomo Shapiro of Krakow (1633), author of Megaleh Amukos
13 Av - R' Mordechai ben Avrohom Benet (1829), author of Techeiles Mordechai
13 Av - R' Yehuda Leib Pesach ben R' Avrohom of Lipsk (1865)
13 Av - R' Yaakov Dovid ben R' Menachem Mendel (Tzemach Tzadik) Hager (1865)
13 Av - R' Yosef of Chelm ben R' Mordechai "Mayim Amukim", talmid of the Chozeh
13 Av - R' Yisroel Shmuel ben R' Aryeh Leibush of Tamoshov (1869) grandson of R' Yosef of Chelm, whose yartzeit is the same day.
13 Av - R' Yaakov Yosef ben R' Moshe of Orzetchov
13 Av - R' Eliyahu Maaravi (1955) was a great leader of Mekubalim in Yerushalayim.
13 Av - R' Yosef Eliyahu Henkin (1973), posek and head of Ezras Torah. He is buried on Long Island in BethDavidCemetery, Elmont, NY.
13 Av - R' Yosef Greenwald of Pupa (1984) ben Yaakov Chizkiya , author of Veyechi Yosef
14 Av - R' Tzvi Hirsch ben R' Ahron Friedman of Liska (1874), talmid of the Divrei Chaim and Rebbe of R' Shayele Kerestirer. He wrote Ach Pri Tevuah
14 Av - R' Yitzchok of Mezritch (1826) talmid of the Chozeh of Lublin
14 Av- R' Yitzchok Friedman of Bohush (1992) ben R' Sholom Yosef of Shpikov, Rebbe from the Rizhin Dynasty
15 Av - Nochum Ish Gamzu, tanna who was known for saying "gamzu letovah" for everything
15 Av – R' Shimon Libya of Tripoli (1585) author of Kesem Paz on Zohar and composer of the famous song "Bar Yochai"
15 Av - R' Amram ben Divan was a great Morocan Tzadik
15 Av - R' Asher (the second)(1873) ben R' Ahron (the second) of Karlin
15 Av - R' Yaakov ben R' Mordechai Yosef Leiner of Izhbitza-Radzin (1878), author of Beis Yaakov
15 Av - R' Meir Noson ben R' Chaim (Divrei Chaim) Halberstam (1855) was the father of the first Bobover Rebbe
15 Av - R' Dovid Yosef ben R' Shlomo Yechiel Biderman of Lelov (1897) He was from the members of the Lelover family that didn't move to Eretz Yisroel. He was Rebbe in Lelov, Poland
15 Av - R' Tzvi Hirsch Halberstam of Rudnik (1918) ben R' Boruch of Gorlitz, grandson of the Divrei Chaim
17 Av - R' Shlomo Chaim Perlow of Koidenov (1862) was the son of R' Ahron, the son of R' Mordechai Yaffe of Lechovitch. They were direct (ben acher ben) descendants of the Levush. He was raised by his maternal grandfather, R' Asher Perlow of Karlin, after his father died, and therefore he is also known by the last name of Perlow. After his uncle, R' Noach of Lechovitch, died, all the chassidim flocked to R' Shlomo. He had several sons that became great Rebbes in their own right.
18 Av - R' Shlomo Chanoch HaKohen of Radomsk HY"D ben R' Yechezkel. A great-grandson of the Tiferes Shlomo who was murdered in Warsaw in 1942.
19 Av - R' Yaakov ben R' Machir Culi, author of Me'am Loez (1732) Here is an article on him, by R' Aryeh Kaplan.
19 Av - R' Naftali be R' Yehuda of Nemerov (1860) One of the closest talmidim of Reb Nachman of Breslov and one of the two witnesses to the promise about reciting Tikun HaKlali at R' Nachman's kever.
19 Av - R' Shimon Sholom ben R' Menachem Kalisch of Amshinov (1954)
19 Av - R' Menachem Nachum ben R' Yitzchok Friedman of Boyan (1936)
20 Av - R' Yehuda Zerachya Azulai (1870) was a great-grandson of the Chida
20 Av - R' Eliezer of Uzipoli (1865) ben R' Yehuda Tzvi of Stretin
20 Av - R' Levi Yitzchok ben R' Boruch Schneur Schneerson (1944) was father of the last Lubavitcher Rebbe, R' Menachem Mendel.
21 Av - R' Chaim ben R' Yosef Dov Ber Soloveitchik, Rosh Yeshiva of Volozhin and Rav of Brisk (1918)
21 Av - R' Ahron ben R' Yisachor Dov Rokeach, the Belzer Rebbe (1957) From the greatest tzadikim of his time. The numerous stories of his tzidkus and miracles are legendary. Many of the great tzadikim in Eretz Yisroel, from all segments, were very close to him. He lost his whole family to the Nazis y's. The fascinating story of his escape can be read in Rescuing the Rebbe of Belz.
21 Av - R' Alexander Sender of Komarna (1818) ben R' Yitzchok Issac was a talmid of the Chozeh of Lublin
21 Av - R' Dovid Hager of Zebultov (1848) ben R' Menachem Mendel of Kosov was a son-in-law of R' Moshe Leib of Sasov. He wrote Tzemach Dovid.
22 Av - R' Mordechai ben R' Hillel, the "Mordechai"HY"D (1298) killed during the Rindfleisch pogroms
22 Av - R' Meir Hagadol of Premishlan (1773) ben R' Yaakov "Tam" was one of the great talmidim of the Baal Shem Tov. The Nadvorna dynasty, with it's many offshoots descend from him. His grandson was the famous R' Meir'l of Premishlan
22 Av - R' Eliyahu Dushnitzer (1949), mashgiach of Lomza Yeshiva, Petach Tikva. The Chazon Ish is reported to have said that he was one of the 36 "hidden tzadikim". He was a talmid of the Chofetz Chaim and one of the ones chosen to get the dibbuk out of a woman, in the well know story told over by R' Elchonon Wasserman.
23 Av - R' Yaakov Yisroel ben R' Chaim Peretz Kanievsky, the Steipler Gaon (1985), author of Kehillas Yaakov. His father was a chosid of R' Yaakov Yisroel of Cherkass, and named him after his Rebbe. The Steipler's son R' Chaim shlita is one of the Gedolei Hador today.
24 Av - R' Ephraim Zalman ben R' Menachem Margolies (1828), Av Beis Din of Brod and author of many sefarim, including Beis Ephraim, Olelos Ephraim and Mateh Ephraim, which is perhaps most famous, contains all the halachos pertaing to Elul and Tishrei.
25 Av - R' Yeshayahu Menachem ben R' Yitzchok of Cracow (1599), originator of the Heter Iska
26 Av- R' Yaakov Meshulam Orenstein (1839), Rov of Lvov and author of Yeshuos Yaakov
26 Av - R' Yehuda Fatiyah (1942) was a talmid of the Ben Ish Chai.
26 Av - R' Yoel ben R' Chananya Yom-Tov Teitelbaum (1979), the Satmar Rebbe, author of VaYoel Moshe and Divrei Yoel, he is buried in Kiryas Joel (Monroe), NY.
26 Av - R' Meir Ashkenazi (1954) Rov of Shanghai
26 Av - R' Eliyahu Baruch Goldschmidt, Mashgiach Ruchni Yeshiva Gedolah Zichron Moshe of South Fallsburg (2000)
27 Av - R' Yehoshua Charif of Cracow, author of Maginei Shlomo (1648)
27 Av - R' Naftali Tzvi Yehuda Berlin (1893) the Nitziv, Rosh Yeshiva of Volozhin, he married the grandaughter of Reb Chaim Volozhiner, author of Ha'emek davar, Ha'emek She'ela and Meshiv Davar
27 Av - R' Yehuda Fattiah, Iraqi Gadol and mekubal, author of Beis Lechem Yehuda (1941)
27 Av - R' Yehuda Pettiyah (1942) was a great mekubal and author of 15 seforim, including Beis Lechem Yehuda and Yayin HaRokeach
27 Av - R' Shmuel Tzvi Hirsh ben R' Avrohom Abish Horowitz, known as Reb Heshele of Spinka (1997)
27 Av - R' Avrohom Mordechai ben R' Yitzchok Meir Alter, son of the Chiddushei Harim, father of the Sfas Emes
28 Av - R' Avrohom Yaakov ben R' Meir HaKohen Pam (2001) was the Rosh Yeshiva of Torah Vadaas and founded the Shuvu organization. He was one of those that was loved by all. He is buried in Mount Judah Cemetery in Queens, NY.
29 Av - R' Shmuel ben R' Yosef Zundel Salanter (1909) Rov of Yerushalayim.
29 Av - R' Menachem Mendel Alter HY"D (1942), Went to his death in Treblinka with "yishuv hadaas, tzidkus and prishus". He was a son of the Sfas Emes, R' Yehuda Aryeh Leib.
29 Av - R' Eliezer Zusia ben R' Yisroel Avrohom Portugal (1982), the Skulener Rebbe was a talmid of the Stefanishter Rebbe. After moving to the USA he founded the Cheseed L'Avrohom orginization. He is buried in the VizhnitzerCemetery in Monsey, NY. His son, R' Yisroel Avrohom, the present Skulener Rebbe, is one of the most respected tzadikim around today. See the story: Shachris with the Skulener Rebbe Brings Success.
R' Kalonymus Kalman ben R' Ahron Halevi Epstein of Krakow (1823) was a talmid of the Rebbe Reb Elimelech of Lizensk. He was the first to spread chassidus in Krakow. His sefer, Meor V'shemesh, is one of the essential and most used seforim of chassidus.
R' Shlomo ben R' Meir Noson Halberstam, the first Bobover Rebbe (1905)
R' Yisroel ben R' Moshe Najara, talmid of Arizal, wrote the famous Friday night song, Koh Ribbon Olam. Wrote sefer Lekach Tov. (There seems to be some confusion between him and his father, who I listed yesterday. I'm not sure whose yahrzeit it really is and what date)
R' Shmuel ben R' Yechiel of Cologne HY"D (1096) He was killed by the crusaders.
R' Menachem Mendel ben R' Levi Yitzchok Schneerson (1994), the Seventh Lubavitcher Rebbe. He was the son-in-law of the previous Lubavitcher Rebbe, R' Yosef Yitzchok Schneerson. They are buried right next to each other in Queens, NY, minutes away from JFK Airport. These are probably the most visited kevarim outside of Eretz Yisroel and are accessible 24 hours a day. There is a visitor's center adjacent to the Ohel with a Shul and place for people to sit and have refreshments. See here for information and directions. For those that live too far away you can send a kvitel through their website.
Rabbeinu Tam, R' Yaakov ben Meir (1100-1171)
R' Pinchos Halevi Horowitz of Frankfurt (1730-1805) ben R' Tzvi Hirsch of Chortkov. One of the great talmidim of the Magid of Mezrich, together with his brother, the Rebbe Reb Shmelke of Nikolsberg. He wrote Sefer Haflah, Sefer Hamkeneh and Panim Yofos and was the Rebbe of the Chasam Sofer.
R' Yisroel Ezriel Hildesheimer (1820-1899), Rov in Germany, talmid of the Aruch La'ner
R' Eliyahu Lupas (1938), Rov in Yeshiva Porat Yosef, wrote Sefer Imrei Pi and Ben Avichayal
R' Chaim Moshe Mandel, mekubal in Bnei Brak (1996)
R' Chaim De la Rosa (1786), Talmid of the Rashash and author of Toras Chochom
R' Moshe ben R' Yaakov Shimshon of Kosov (1855 - 1925) author of Leket Ani
R' Shmuel Majar (1848) Av Beis Din in Yerushalayim and Rosh Yeshiva of Chasidei Beis El.
R' Yisrael Yaakov Algazi (1756) Great Mekubal who lived in Turkey and Eretz Yisrael. He was the Rosh Yeshivah of Neveh Sholom Bris Avrohom and Beis El and was Rov of Yerushalyim
R' Boruch Frankel-Tumim (1828), author of Boruch Taam, father-in-law of R' Chaim of Sanz
R' Gedalya Schorr (1979), Rosh Yeshiva in Torah Vodaas, author of Ohr Gedalyahu
R' Simcha Bunim Alter of Ger, the Lev Simcha (1992) son of R' Avrohom Mordechai, the Imrei Emes. Became Rebbe after his brother, the Beis Yisroel, passed away.
R' Shlomo ben R' Yehudah HaKohen (1827) Great Mekubal who wrote Yafeh Sha'ah
R' Meir ben R' Eliezer Horowitz of Dzikov (1877) Imrei Noam
R' Eliyahu Manni (1899) Great Mekubal who was Rov of Chevron and wrote Zichronos Eliyahu
R' Aryeh Leib ben R' Mordechai Halevi Epstein (1775), author of Hapardes
R' Chaim HaCohen Rappaport, Rov of Lvov
R' Mordechai of Kremnitz (1820) ben R' Yechiel Michel of Zlotchov
R' Moshe ben R' Naftoli Hirsch Rivkash (1671), the author of Be'er Hagolah on Shulchan Aruch
R' Chanoch Henoch Dov ben Elazer Rubin (1920), Sassover Rebbe of London
R' Yosef ben R' Moshe Trani, Maharit (1639)
R' Mordechai Attiah (1978) Great Sephardic Rosh Yeshiva in Yerushalyim
R' Yaakov Yitzchok ben Yehudah Leib HaLevi Ruderman (1987) Founder and Rosh Yeshiva of Ner Yisroel of Baltimore, talmid of the Alter of Slabodka
R' Yitzchok Issac Rosenbaum, Zutchka Rebbe (2000) son of R' Isamar of Nadvorna
R' Chaim ben R' Moshe Ibn Atar, the Ohr HaChaim HaKodosh (1743)
R' AryehLeib ben R' Asher Ginzberg, the Shagas Aryeh(1695-1785) One of the greatest minds of his time. The Vilna Gaon said that the Shagas Aryeh was greater than him in nigleh, but not in nistar.
R' Amram Blau, head of Neturei Karta in Yerushalayim (1974) This "Neturei Karta" is not to be confused the one in the news recently. The shita of the real "Neturei Karta" was basically the same as that of the Satmar Rebbe. He fought against the desecration of Shabbos in Eretz Yisroel and was respected by the Chazon Ish and many other gedolim of the time. His brother was R' Moshe Blau of Agudas Yisroel.
Chur, son of Kalev and Miriam (1309 B.C.E.) Was killed trying to prevent the making of the Eigel
R' Shmuel Yaakov Weinberg, Rosh Yeshiva of Ner Yisroel (1999)
R' Chaim Meir Yechiel ben R' Dov Beirish Shapiro (2007) Naroler Rov who passed away just shy of his 100th birthday
R' Yitzchok Issac ben R' Yoel Leib Halevi Herzog (1959), Chief Rabbi of Ireland and Eretz Yisroel, wrote Heichal Yitzchok
R' Eliezer Yehuda ben R' Nosson Tzvi Finkel, Rosh Yeshiva of Mir (1965) His father was the Alter of Slabodka.
R' Yona Stenzel, initiator of Halacha and Mishnah Yomi
R' Bentzion Abba Shaul ben R' Eliyahu (1998), Rosh Yeshiva of Porat Yosef, Great Sephardic tzadik who was recognized as one one of the greatest halachic authorites of his time.
R' Nosson Nota Hanover HY"D (1683) ben R' Moshe was a talmid of the Maharshal and author of Yaven Metzula and Shaarei Tzion, a very popular kabalistic sefer of tefilos and minhagim. He was killed by a stray bullet.
R' Avrohom Yitzchak Bloch HY"D ben R' Yosef Leib, Telzer Rosh Yeshiva (1941) Killed by the Nazis y's
R' Avrohom Chaim Noeh (1954) was one of the leading poskim in Eretz Yisroel. His "shiurim" for units of measure are among the most well known, even by those that don't use them. He is the author of Ketzos HaShulchon, Shiurei Torah and Gesher HaChaim.
R' Chaim Shaul Karelitz (2001), nephew of the Chazon Ish, Mashgiach Ruchni of Yeshiva Beis Meir and Talmud Torah Tashbar
R' Shlomo Machlama, author of Merkaves HaMisheneh on Rambam
R' Avrohom Mattisyahu ben R' Menachem Nochum Friedman of Shtefanesht (1933)
R' Shlomo HaLevi of Karlin HY"D (1792) ben R'Meir was a talmid of the Magid of Mezritch and R' Ahron HaGadol of Karlin, who he succeeded as Rebbe. After his passing R' Ahron HaGadol's son, Reb Asher, became Rebbe.
R' Avrohom Grodzinksi HY"D (1942), Mashgiach Ruchni of the Slabodka Yeshiva
R' Levi Yitzchok ben R' Avrohom Noach Bender (1989) was a talmid of R' Avrohom Chazan and was one of the great Breslov leaders of his time. See here for more and links at the bottom of the page to fascinating excerpts from his sefer.
R' Moshe ben R' Yaakov Cordovero, the Ramak (1570) was one of the most famous mekubalim. He studied nigleh under R' Yosef Caro and kabala under his brother-in-law, R' Shlomo Alkabetz. He wrote several seforim, including Pardes Rimonim and Tomer Devorah. The Satmar Rebbe had a kabala from the Divrei Chaim of Sanz that the sefer Tomer Devorah is a segula for the "known disease" – may Hashem save us, and if one isn't able to learn it himself, he should have someone read it in front of him. (It is available in English translation)
R' Gedalia Ahron ben R' Elazar Mordechai Kenig (1980), one of the leaders of Breslov, was a talmid muvhak of R' Avrohom Sternhartz, who encouraged him to establish Kiryat Breslov in Tzefas. His son, R' Elazar Mordechai Shlita, is the current leader of the community. R' Gedalia wrote Chayei Nefesh, on R' Chaim Volozhiner's Nefesh HaChaim, proving that there is no argument between Chassidim and Misnagdim on the principles and foundations of Yidishkeit, as they are beyond dispute. Parts have been translated into English by Rabbis Dovid Sears and Dovid Zeitlin, of The Breslov Center, and are available for download (PDF) - Part 1 and Part 2. They are quite fascinating and explain a lot.
R' Yechezkel Katzenellenbogen, the Knesses Yechezkel (1749)
R' Shaul Moshe Zilberman, the Rov of Viereshov, author of Pardes Shaul
R' Yaakov Yosef ben R' Dov (1902), the first and only Chief Rabbi of New York. He was a talmid of the Volozhiner Yeshiva and was known as "Reb Yaakov Charif" because of his sharp mind. He is buried in Queens, NY at Union Field Cemetery. Large crowds go to daven there on the yartzeit, and the cemetery opens earlier and closes later on the yartzeit. The Satmar Rebbe encouraged people to go to his kever. People also go there throughout the year to daven for yeshuos. See here for more on this great leader, who gave his life for Yiddishkeit in the late 19th century.
R' Meir HaLevi of Apta ben R' Shmuel (1827), author of Ohr LaShomayim. He was the Rov of Apta after the Ohev Yisroel, who moved to Mezibuz, after sensing that R' Meir was supposed to become Rov of Apta. He was a talmid muvhak of the Chozeh of Lublin. One of his most famous talmidim is the Tiferes Shlomo of Radomsk.
R' Ahron Brachya of Modina, author of Maavar Yabok
R' Shmuel Rozovsky, Rosh Yeshiva in Ponovezh
R' Elazar of Lizhensk (1806) was the oldest son of the Rebbe Reb Elimelech of Lizensk. He put together his father's sefer, Noam Elimelech, which has several letters of R' Elazar in the back. His sons were R' Naftali of Lizensk and R' Mendel Ber of Pshevorsk and his son-in-law was R' Chaim Meir Yechiel Shapira of Moglenitz.
R' Moshe ben R' Tzvi Hirsch Teitelbaum of Uhel (1841), author of Yismach Moshe, was a talmid of the Chozeh of Lublin. He said he remembers himself in a previous gilgul in Mitzraim and could even describe what the house that he stayed in looked like. He said that when the machlokes of Korach took place he didn't take any sides; he stayed in his tent until the machlokes ended and only then came out, when it was determined who was correct. R' Meshulam Igra said on him: "Moshe Emes v'Toraso Emes". The Sighet and Satmar dynasties descend from him.
R' Nachman ben R' Chaim Aryeh HaKohen Kahana (1904) was the Av Beis Din of Spinka. He was the son-in-law of the first Spinka Rebbe, the Imrei Yosef. He wrote sefer Orchos Chaim on Shulchan Aruch Orach Chaim.
R' Yaakov Shaul Elishar (1906) Sephardic Chief Rabbi of Eretz Yisroel, the Givat Shaul neighborhood in Yerushalayim is named after him
R' Chaim Friedlander (1986), Mashgiach in Ponovezh (1986) author of Sifsei Chaim
Reb Boruch of Mezibuzh says that on Rosh Hashana we are judged on material matters, but on Shavuos we are judged on spiritual matters. (Botzina Dinehora)
It says “ad mochoras haShabbos”, meaning that we have the whole sefira including the 50th day to teshuva and purify ourselves (the word “sapir” can mean purify). And if one can’t purify himself, even on the last day, then he has no choice but to attach himself to the Tzadik Emes, and he will lift him up and purify him. Through his attachment to the Tzadik Emes, he will be able to do teshuva. (Divrei Dovid)
The Magid of Koznitz says: Before the receiving of the Torah the men were commanded in Shemos (19:15) אַל-תִּגְּשׁוּ, אֶל-אִשָּׁה – don’t come near your wives. Male is a “giver” and female is an “receiver”. The Mishana (Avos 1:3) says that we should serve Hashem without any intention of receiving reward. That’s what this alludes to; we shouldn’t be in bechinas isha, in other word an acceptor, wanting to receive reward, but should accept the Torah and fulfill the mitzvas lishma. (Avodas Yisroel)
Segulas for Children
There is a segula for one that wants a son to separate 91 perutahs on Erev Shavuos and then add more till he gets to 104, the gematria of 2 times ben, and then give it to a humble, worthy talmid chacham. (R’ Yaakov Falagi, Father of R’ Chaim Falagi)
Shevuos is a good time to daven for barren woman. It is brought down from mekubolim that when the Mishna in Roshana says that we are judged on fruits of the tree, it refers to children, because man is called a tree and the fruits are the children produced.
Tikkun Leil Shevuos
There is a custom to stay up all night on Shavuos learning Torah. The Arizal and the Shela put together an order of learning called Tikkun Leil Shevuos which many (among them Chida, Yesod Veshores Ha’Avodah and Kav HaYosher) say one should learn Shavuos night, because it accomplishes great tikkunim. The Gra used to do this also. Other’s, however, learn Gemara or other subjects with a chavrusa or listen to shiurim. Although the seforim hakedoshim emphasize the importance of saying Tikkun, it would seem that if one can’t do this that any method of learning is good.
The main thing is that one shouldn’t waste away the time. If one is going to engage in frivolous conversation then it is better to go to sleep, as the Pela Yoetz says “the sleep is good for him and good for the world”.
Arizal says that one who stays up learning Torah Shavuos Night, without wasting time, will live out the year.
It is a tikun for forbidden things one has seen with his eyes. (Pela Yoetz)
R’ Chaim Palagi says that one who awake learning Shavuos night, his Mazel will not sleep, he will clive out the year, will have sons and grandsons that are Talmidei Chachomim, is a tikin for the Shechina and is a tikun for looking at forbidden things. (Moed L’kol Chai)
The Tikun Leil Shavuos of the Rizhiner
Someone was sitting by the Tish of Reb Yisroel of Ruzhin, Shavuos night, thinking to himself that he should really be in the Beis Medrash learning Tikkun Keil Shavuos. The Rizhiner perceived what this individual was thinking with his ruach hakodesh and said the first letters of “tarich lifonei shulchon” (set before Me a table) are the same as Tikun Leil Shavuos. The man understood the message. This story could be understood through another story.
The Rizhiner ate very little, just enough to sustain him. One time, when they were reciting Birchas Hamazon, someone said to his friend that the Rebbe really isn’t allowed to bentch, because he ate less then an olive sized piece of bread. (Torah law requires one to be fully satisfied, but the Rabonon said that one should bentch on even an olive sized piece of bread.) The Rizhiner perceived the thoughts of this man and said that although the general law is that one bentches after eating an olive sized piece of bread, according to Torah law one bentches when they are satisfied on any amount of bread, and he is fully satisfied with a small piece. (I heard something very similar in the name of the Chasam Sofer.) We can see how lofty was the simple eating of the holy Rizhiner, he ate exactly what he needed, with all the proper thoughts. Now we can understand what he meant by saying that “tarich lifonei shulchon” has the same first letters as Tikun Leil Shavuos.
Mikvah The mikvah of Shavuos morning (for men), shortly before Alos Hashachar, daybreak (some say 15 minutes before; some say 30 minutes before), purifies us from the seven weeks of sefira. There are great tikunim involved. It is the Mikvah of the 50th gate of binah, and of great lovingness and mercy. Mikvah saves from all troubles. (See Breslov Center's article on this and see Likutei Mohoran 56:7 for more on this.)