6 Kislev - R' Michoel Ber Weissmandel (1957), Rosh Yeshiva of Nitra Yeshiva, renowned for his mesiras nefesh during the Holocaust, risking his own life to save Jews. His wife and children were murdered by the Nazis y's.
6 Kislev - R' Shlomo Abu Maaravi (1989), founder of Otzer HaTorah network
6 Kislev - R' Chaim Shmuel ben R' Eliyahu Lopian, author of Recha Shmaitza (1999)
6 Kislev - R' Yechezkel Shraga ben R' Yisochor Dov Lipshutz-Halberstam (1995) Stropkover Rebbe and author of Divrei Yechezkel Shraga
7 Kislev - R' David Sinzheim of
7 Kislev - R' Ahron HaLevy Epstein of Cracow (1881) son of R' Klonimus Kalman, the Meor Veshemesh
7 Kislev - R' Shlomo Binyamin HaLevi Ashlag (1983), son of R' Yehuda Leib author of HaSulam on Zohar
8 Kislev - R' Aharon ben R' Mordechai Twersky of
8 Kislev - R' Dovid ben R' Shmuel Bornstein of Sochatchov, author of Chasdei Dovid (1942) Died in the Warsaw ghetto
8 Kislev - R' Pinchas Dovid ben R' Shmuel Shmelke HaLevi Horowitz, the first Bostoner Rebbe (1941)
9 Kislev - R' Dov Ber ben R' Schneur Zalman Schneerson, Mitteler Rebbe of Lubavitch (1827)
9 Kislev - R' Noson ben R' Tzvi Trevitzer of Tzfas (1918) One of the Ziknei Breslov.
10 Kislev - R' Moshe Mordechai Margulios, Rov and Av Beis Din of Cracow, author of Chasdei Hashem (1616)
10 Kislev - R' Pinchas Menachem Elazar ben R' Binyomin Elazar Yustman (1920), Piltzer Rebbe, grandson of the Chiddushei Harim, author of Sifsei Tzaddik
10 Kislev - R' Moshe Mordechai Epstein, Rosh Yeshiva of Slabodka and Chevron Yeshiva
10 Kislev - R' Isser Zalman ben R' Boruch Peretz Meltzer, Rosh Yeshiva of Slutzk and Etz Chaim in Yerushalayim (1953) author of Even Haezel
11 Kislev - R' Yitzchak ben R' Yisroel Friedman of Sadiger (1924) Great-grandson of the Rizhiner. He died on a visit to the USA at the age of 39. He is buried in Queens, NY at Mt. Zion Cemetery.
11 Kislev - R' Tzvi Aryeh Ben-Zion ben R' Yisroel Abba Rosenfeld (1978) Responsible for spreading Breslov in the USA. He was a descendant of R' Ahron of Breslov and the Tcheriber Rov. He gave many shiurim aon Reb Nachman's teachings in English. You can listen to them here.
12 Kislev - R' Shlomo ben R' Yechiel Luria Ashkenazi, the Maharshal, author of Yam Shel Shlomo and Chochmas Shlomo (1573)
12 Kislev - R' Yitzchak Lampronti, author of Pachad Yitzchak
12 Kislev - R' Avrohom Dov ben R' Dovid of Averitch (1840) Talmid of R' Nochum and R' Motel of Chernobyl. Author of Bas Ayin. He moved to Tzfas, Eretz Yisroel and is buried there. His shul still stands, after surviving the famous earthquake.