The Tribe of Gad (גָּד "soldier", Standard Hebrew Gad, Tiberian Hebrew Gāḏ) is one of the Hebrew tribes, founded by Gad son of Jacob, who was born to Zilpah, the handmaiden of Jacob's first wife, Leah.

The Tribe of Gad settled east of the River Jordan in the land of Gilead. Gad was one of the 10 tribes that made up the northern kingdom after the 12 tribe nation had split into 2 kingdoms. The northern kingdom was called Israel, and the southern called Judah. Eventually the northern kingdom was sent into captivity, and then they are said to have disappeared.

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GAD stands for Glutamic Acid Decarboxylase