Gamaliel V held the office of Nasi

Nasi

Nāśī’ is a Hebrew title meaning prince in Biblical Hebrew, Prince in Mishnaic Hebrew, or president in Modern Hebrew.-Genesis and Ancient Israel:...

of the ancient Jewish Sanhedrin

Sanhedrin

The Sanhedrin was an assembly of twenty-three judges appointed in every city in the Biblical Land of Israel.The Great Sanhedrin was the supreme court of ancient Israel made of 71 members...

 between 365 and 385 CE. He was the son and successor of the Jewish patriarch Hillel II

Hillel II

Hillel II, also known simply as Hillel held the office of Nasi of the ancient Jewish Sanhedrin between 320 and 385 CE. He was the son and successor of Judah III. He was a Jewish communal and religious authority, circa 330 - 365 CE...

. He was notable for involving himself with perfecting the Jewish calendar in 359. He is apparently referred to in a letter written by Saint Jerome

Saint Jerome

Saint Jerome is a Christian church father, best known for translating the Bible into Latin.Saint Jerome may also refer to:*Jerome of Pavia , Bishop of Pavia...

, in which Jerome states that Theodosius I

Theodosius I

Theodosius I , also known as Theodosius the Great, was Roman Emperor from 379 to 395. Theodosius was the last emperor to rule over both the eastern and the western halves of the Roman Empire. During his reign, the Goths secured control of Illyricum after the Gothic War, establishing their homeland...

 (379-395) had condemned to death one Esychius, a former Roman consul

Roman consul

A consul served in the highest elected political office of the Roman Republic.Each year, two consuls were elected together, to serve for a one-year term. Each consul was given veto power over his colleague and the officials would alternate each month...

 who had stolen documents belonging to Gamaliel, who was furious about it.