The children of Machir. The relation of the Beni-Machir to the tribe of Manasseh is obscure, because all the Manassites were descended from Machir. In the absence of any direct information, we can only guess at the nature of the tie which united the Beni-Machir as a family, and kept them distinct from the other Manassite families.
It is evident from their history that they formed a sub-tribe powerful enough to have a name of their own in Israel. Went to Gilead. This would seem to refer to the expedition briefly recorded in chapter 21:33.
It is mentioned here out of place, in the simple historical style of the Pentateuch, because the gift of Gilead to Machir grew out of its conquest by Machir. The name Gilead is again used in a very vague sense, for the territory actually allotted to Machir was rather in Bashan than in Gilead proper.