New Defender's Study Bible Notes
11:2 And Gilead. Gilead was the general name of the hilly region east of the Jordan, occupied by the tribes of Reuben, Gad, and half-Manasseh. Apparently this name was given to several Biblical characters (the name itself means “strong rock”), including the father of Jephthah. This Gilead was also a Gileadite–that is, belonging to the tribe descended from Gilead, the son of Machur, the son of Manasseh (Numbers 26:29).