Rashi

Shlomo Yitzhaki (Hebrew: רבי שלמה יצחקי‎) or Isaacides and better known by the acronym Rashi (Hebrew: רש"י‎, RAbbi SHlomo Itzhaki), was a medieval French rabbi famed as the author of a comprehensive commentary on the Talmud, as well as a comprehensive commentary on the Tanakh (Hebrew Bible). He is considered the "father" of all commentaries that followed on the Talmud (i.e., the Baalei Tosafot) and the Tanakh (i.e., Ramban, Ibn Ezra, Ohr HaChaim, et al.)

Acclaimed for his ability to present the basic meaning of the text in a concise yet lucid fashion, Rashi appeals to both learned scholars and beginning students, and his works remain a centrepiece of contemporary Jewish study. His commentary on the Talmud, which covers nearly all of the Babylonian Talmud (a total of 30 tractates), has been included in every edition of the Talmud since its first printing by Daniel Bomberg in the 1520s. His commentary on Tanakh — especially his commentary on the Chumash ("Five Books of Moses") — is an indispensable aid to students of all levels. The latter commentary alone 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.