Gamaliel

A celebrated Pharisee in the generation after Christ, a doctor of the law, and member of the Sanhedrin. He possessed great influence among the Jews, and is said by some to have presided over the Sanhedrin during the reigns of Tiberius, Cains, and Claudius. The Talmundists say that he was the son of Rabbi Simeon, and grandson of Hillel, the celebrated teacher of the law, and that upon his death the glory of the law departed. His noble intervention before the Sanhedrin saved the apostles from an ignominious death, and shows that he was gifted with great wisdom and tolerance, if not strongly inclined towards the gospel, Acts 5:33-40. The apostle Paul thought it a high honor to have been one of his pupils, Acts 22:3, and no doubt received from him not only a zealous enthusiasm for the Jewish law, but many lessons of candor, impartiality, and liberality. His high renown, however, among the Jewish rabbins of later ages, seems inconsistent with the tradition that he embraced Christianity.

Source: ATS Bible Dictionary
Gamaliel

Reward of God. A chief of the tribe of Manasseh at the census at Sinai (Numbers 1:10; 2:20; 7:54,59).

The son of rabbi Simeon, and grandson of the famous rabbi Hillel. He was a Pharisse, and therefore the opponent of the party of the Sadducees. He was noted for his learning, and was president of the Sanhedrim during the regins of Tiberius, Caligula, and Claudius, and died, it is said, about eighteen years before the destruction of Jerusalem.

When the apostles were brought before the council, charged with preaching the resurrection of Jesus, as a zealous Pharisee Gamaliel councelled moderation and calmness. By a reference to well-known events, he advised them to "refrain from these men." If their work or counsel was of man, it would come to nothing; but if it was of God, they could not destroy it, and therefore ought to be on their guard lest they should be "found fighting against God" (Acts 5:34-40). Paul was one of his disciples (22:3).

Source: Easton's Bible Dictionary
Gamaliel

(recompense of God ). Son of Pedahzur; prince or captain of the tribe of Manasseh at the census at Sinai, (Numbers 1:10; 20:20; 7:54,59) and at starting on the march through the wilderness. ch. (Numbers 10:23) (B.C. 1490.) A pharisee and celebrated doctor of the law, who gave prudent worldly advice in the Sanhedrin respecting the treatment of the followers of Jesus of Nazareth. (Acts 5:34) ff. (A.D. 29.) We learn from (Acts 22:3) that he was the preceptor of St. Paul. He is generally identified with the very celebrated Jewish doctor Gamaliel, grandson of Hillel, and who is referred to as authority in the Jewish Mishna.

Source: Smith's Bible Dictionary