Eastons Bible Dictionary
Ishmael's eldest son (Gen. 25:13),
and the prince of an Israelitish tribe (16). He had a sister, Mahalath, who was one of Esau's wives (Gen. 28:9; 36:3).
The name of the Ishmaelite tribe descended from the above (Gen. 25:13,18).
The "rams of Nebaioth" (Isa. 60:7)
are the gifts which these wandering tribes of the desert would consecrate to God.