Simeon (or Shimon) ben Gamliel II (Hebrew: רבן שמעון בן גמליאל השני) was a Tanna of the third generation and president of the Great Sanhedrin. Shimon was a youth in Betar when the Bar Kokhba revolt broke out, but when that fortress was taken by the Romans he managed to escape the massacre (Gittin 58a;Sotah 49b;Bava Kamma 83a;Yer. Ta'anit 24b). On the restoration of the college at Usha, Shimon was elected its president, this dignity being bestowed upon him not only because he was a descendant of the house of Hillel, but in recognition of his personal worth and influence. His traditional burial location is in Kfar Manda in the Lower Galilee.
There were many children in his family, one-half of whom were instructed in the Torah, and the other half in Greek philosophy (Gittin 58a;Sotah 49b;Bava Kamma 83a;). According to the Jewish Encyclopedia, Shimon himself seems to have been trained in Greek philosophy; this probably accounting for his declaring later that the Scriptures might be written only in the original text and in Greek (Meg. 9b; i. 8;Yer. Meg. 71c). Shimon appears to have studied natural science as well, for some of his sayings betray a scientific knowledge of the nature of plants and animals, while others concern the anatomy of the human body and the means of avoiding or of curing disease (Ber. 25a, 40a;Shab. 78a, 128b;Yeb. 80b;Ket. 59b, 110b). It is not known who were his teachers in the Halakah; he transmits sayings of R. Judah bar Ilai (Tosef., Kelim, B. Ḳ. v. 4), of R. Meir (Shab. 15b;B. M. 106b;Tosef., Ket. vi. 10;Yer. Ket. vi. 7 ), and of R. Jose bar Ḥalafta (Tosef., Dem. iii. 12;Tosef., Ṭoh. xi. 16). The last-named was honored as a teacher by Shimon, who addressed questions to him, and put many of his decisions into practice (Suk. 26a;Tosef., Dem. iii. 14).