Rashbam

Shmuel ben Meir (Rashbam) was a French Tosafist and Torah commentator. He was a son of Rashi's daughter, Yocheved, and older brother of the famous Tosafists, Isaac ben Meir (Rivam) and Jacob ben Meir (Rabbeinu Tam). His Torah commentary is concise, and hews strictly to the concept of the "peshat" or plain-sense meaning of the text, sometimes at the expense of received rabbinic traditions. He does not hesitate to argue with Rashi when he feels that his commentary strayed from the plain meaning of the verse. Rashbam also wrote a lengthier commentary on the Talmud, portions of which are printed in the Vilna Shas where no commentary of Rashi is available. Rashbam's opinions are also frequently mentioned in the Tosafot throughout Shas.