Numbers 13:15

Gad : the tribe of Israel descended from Gad, the son of Jacob,the man; the son of Jacob and Zilpah,the tribe of Gad in Israel,a prophet and long time advisor to King David

Geuel : son of Machi of Gad; a spy sent by Moses

Machi : father of Geuel, of Gad, who helped spy out Canaan