Shlomo Yitzchaki ( 22 February 1040 – 13 July 1105), today generally known by the acronym Rashi (Hebrew: רש"י, RAbbi SHlomo Itzhaki), was a medieval French rabbi and author of a comprehensive commentary on the Talmud and commentary on the Tanakh. Acclaimed for his ability to present the basic meaning of the text in a concise and lucid fashion, Rashi appeals to both learned scholars and beginner students, and his works remain a centerpiece of contemporary Jewish study. His commentary on the Talmud, which covers nearly all of the Babylonian Talmud (a total of 30 out of 39 tractates, due to his death), has been included in every edition of the Talmud since its first printing by Daniel Bomberg in the 1520s. His commentary on Tanakh—especially on the Chumash ("Five Books of Moses")— serves as the basis for more than 300 "supercommentaries" which analyze Rashi's choice of language and citations, penned by some of the greatest names in rabbinic literature.
(Retrieved from https://en.wikipedia.org/wiki/Rashi)
"Moses son of Nahman" ( 1194–1270), commonly known as Nachmanides and also referred to by the acronym Ramban was a leading medieval Jewish scholar, Sephardic rabbi, philosopher, physician, kabbalist, and biblical commentator. He was raised, studied, and lived for most of his life in Girona, Catalonia. He is also considered to be an important figure in the re-establishment of the Jewish community in Jerusalem following its destruction by the Crusaders in 1099.
(Retrieved from https://en.wikipedia.org/wiki/Nachmanides)
Isaac ben Jacob Alfasi ha-Cohen (1013–1103) also known as the Alfasi or by his Hebrew acronym Rif (Rabbi Isaac al-Fasi),was an Algerian Talmudist and posek (decider in matters of halakha - Jewish law). He is best known for his work of halakha, the legal code Sefer Ha-halachot, considered the first fundamental work in halakhic literature.
(Retrieved from https://en.wikipedia.org/wiki/Isaac_Alfasi)
Moses ben Maimon commonly known as Maimonides , and also referred to by the acronym Rambam for Rabbeinu Mōšeh bēn Maimun, "Our Rabbi Moses, son of Maimon"), was a medieval Sephardic Jewish philosopher who became one of the most prolific and influential Torah scholars of the Middle Ages. In his time, he was also a preeminent astronomer and physician. Born in Córdoba, Almoravid Empire (present-day Spain) on Passover Eve, 1135 or 1138, he worked as a rabbi, physician, and philosopher in Morocco and Egypt. He died in Egypt on December 12, 1204.
(Retrieved from https://en.wikipedia.org/wiki/Maimonides)
Elijah ben Solomon Zalman, known as the Vilna Gaon or Elijah of Vilna, or by his Hebrew acronym HaGra ("HaGaon Rabbenu Eliyahu") or Elijah Ben Solomon (Sialiec, April 23, 1720 – Vilnius October 9, 1797), was a Talmudist, halakhist, kabbalist, and the foremost leader of misnagdic (non-hasidic) Jewry of the past few centuries. He is commonly referred to in Hebrew as ha-Gaon he-Chasid mi-Vilna, "the pious genius from Vilnius".
(Retrieved from https://en.wikipedia.org/wiki/Vilna_Gaon)
Chaim (Halevi) Soloveitchik, also known as Reb Chaim Brisker (1853 – 30 July 1918), was a rabbi and Talmudic scholar credited as the founder of the popular Brisker approach to Talmudic study within Judaism. A member of the Soloveitchik-family rabbinical dynasty, he is commonly known as Reb Chaim Brisker ("Rabbi Chaim [from] Brisk").
(Retrieved from https://en.wikipedia.org/wiki/Chaim_Soloveitchik )
Joseph ben Ephraim Karo, (1488 – March 24, 1575, 13 Nisan 5335 A.M.), was author of the last great codification of Jewish law, the Shulchan Aruch, which is still authoritative for all Jews pertaining to their respective communities. To this end he is often referred to as HaMechaber (Hebrew: "The Author") and as Maran (Aramaic: "Our Master").
(Retrieved from https://en.wikipedia.org/wiki/Joseph_Karo )
Israel Meir (HaKohen) Kagan (January 26, 1839 – September 15, 1933), known popularly as the Chofetz Chaim was an influential rabbi of the Musar movement, a Halakhist, posek, and ethicist whose works continue to be widely influential in Jewish life.
(Retrieved from https://en.wikipedia.org/wiki/Israel_Meir_Kagan )
Moshe Feinstein or Moses Feinstein ( March 3, 1895 – March 23, 1986) was a rabbi, scholar, and posek (an authoritative adjudicator of questions related to Jewish law), who was world-renowned for his expertise in Halakha, gentleness, and compassion, and was regarded by many as the de facto supreme halakhic authority for observant Jews in North America. In the Orthodox world, he is widely referred to simply as "Reb Moshe", and his halakhic rulings are often referenced in contemporary rabbinic literature.
(Retrieved from https://en.wikipedia.org/wiki/Moshe_Feinstein )
Judah Loew ben Bezalel, alt. Löw, Loewe, Löwe, or Levai, (between 1512 and 1526? – 17 September 1609) widely known to scholars of Judaism as the Maharal of Prague, or simply The Maharal, the Hebrew acronym of "Moreinu Ha-Rav Loew" ("Our Teacher, Rabbi Loew"), was an important Talmudic scholar, Jewish mystic, and philosopher who, for most of his life, served as a leading rabbi in the cities of Mikulov in Moravia and Prague in Bohemia. Due to his unprecedented impact on Jewish study, he is considered one of the most important rabbis of all times.
Within the world of Torah and Talmudic scholarship, Loew is known for his works on Jewish philosophy and Jewish mysticism and his work Gur Aryeh al HaTorah, a supercommentary on Rashi's Torah commentary.
(Retrieved from https://en.wikipedia.org/wiki/Judah_Loew_ben_Bezalel )
Rabbi Yisrael ben Ze'ev Wolf Lipkin, also known as "Israel Salanter" or "Yisroel Salanter" (November 3, 1809, Zhagory – February 2, 1883, Königsberg), was the father of the Musar movement in Orthodox Judaism and a famed Rosh yeshiva and Talmudist. The epithet Salanter was added to his name since most of his schooling took place in Salant (now the Lithuanian town of Salantai), where he came under the influence of Rabbi Yosef Zundel of Salant.
(Retrieved from https://en.wikipedia.org/wiki/Israel_Salanter )
Israel ben Eliezer (born circa 1698, died 22 May 1760), known as the Baal Shem Tov or as the Besht, was a Jewish mystical rabbi from Poland, who is regarded as the founder of Hasidic Judaism. "Besht" is the acronym for Baal Shem Tov, which means "Master of the Good Name" or "one with a good reputation".
(Retrieved from https://en.wikipedia.org/wiki/Baal_Shem_Tov)
Isaac (ben Solomon) Luria Ashkenazi (1534 – July 25, 1572) , commonly known in Jewish religious circles as "Ha'ARI" (meaning "The Lion"), "Ha'ARI Hakadosh" [the holy ARI] or "ARIZaL" [the ARI, Of Blessed Memory (Zikhrono Livrakha)], was a foremost rabbi and Jewish mystic in the community of Safed in the Galilee region of Ottoman Syria. He is considered the father of contemporary Kabbalah, his teachings being referred to as Lurianic Kabbalah. While his direct literary contribution to the Kabbalistic school of Safed was extremely minute (he wrote only a few poems), his spiritual fame led to their veneration and the acceptance of his authority. The works of his disciples compiled his oral teachings into writing. Every custom of the Ari was scrutinized, and many were accepted, even against previous practice.
(Retrieved from https://en.wikipedia.org/wiki/Isaac_Luria )