Deuteronomy 3:15

“And I gave Gilead unto Machir.] The son of Manasseh; not to him personally, who cannot be thought to have been living at this time, but to his posterity, to the Machirites; (see <043240>Numbers 32:40).”

“I gave Gilead unto Machir--It was only the half of Gilead (Deu 3:12-13) which was given to the descendants of Machir, who was now dead.”

“Gilead - That is, the half part of Gilead. To Machir - That is, unto the children of Machir, son of Manasseh, for Machir was now dead. Deuteronomy 3:16”

“3:15 Makir was a clan in the tribe of Manasseh (Num 26:29) to which Jair was related (1 Chr 2:21-23). The clan of Makir settled south of Bashan in the northern part of Gilead (see Deut 3:13).”

“Machir: Gen 50:23; Num 26:29, Num 32:39, Num 32:40; Jos 17:1-3, Jos 22:7 Deuteronomy 3:16”

“Machir received Gilead (see Num 32:40). \- In Deu 3:16 and Deu 3:17 the possession of the tribes of Reuben and Gad is described more fully according to its boundaries. They received the land of Gilead (to the south of the Jabbok) as far as the brook Arnon, the middle of the valley and its territory. הנּחל תּוך is a more precise definition of ארנן נחל, expressive of the fact that the territory of these tribes was not to reach merely to the northern edge of the Arnon valley, but into the middle of it, viz., to the river Arnon, which flowed through the middle of the valley; and וּגבוּל (and the border) is an explanatory apposition to what goes before, as in Num 34:6, signifying, "viz., the…”