Rabbeinu Chananel (born approximately 975) was the head of the Yeshiva in Kairuan, which became internationally recognized as a great center of learning.

Rabbi Sh'muel ben Meir (Rash'bam) (approximately 1085 - 1174) was one of the gransons of Rashi, and is well known for his concentration on the literal meaning of the text.

Rabbi David Kimchi (R'dak) (1160 - 1235) was born in Narbonne, wrote commentary on the Tanach, and is well known for his major work dealing with grammar of the Holy Tongue, Sefer Hashorashim.

Rabbi Ovadiah Seforno (born 1470) served as the Rabbi of Rome for over 30 years and was a physician.

On the meaning of the title Hachut Hameshulash: In Kohelet 4, 9-12 we read the following statement by King Solomon, the author: “Two are better off than one, in that they have greater benefit from their joint endeavours. For should they fall, one can raise the other; but woe betide to him who is alone and falls with no companion to raise him! Further, when two lie together they are warm; but how can he who is alone get warm? Also, if one attacks, two can stand up to him. A threefold cord is not readily broken!”