Nebaioth - (Easton's Bible Dictionary)
Height. (1.) 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).
(2.) 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.