1 Chronicles 2:21

And afterward Hezron went in to the daughter of Machir. — This appears to mean, after the birth of the three sons mentioned in 1 Chronicles 2:9.

Machir. — The firstborn of Manasseh (Genesis 1:23), to whom Moses gave the land of Gilead (Numbers 32:40; Deuteronomy 3:15). This explains the term “father of Gilead.” The great clan of Machir was the ruling clan in Gilead. Comp. Numbers 26:28, which mentions the clan of the Machirites, and adds that “Machir begat Gilead,” which perhaps means to say that the Israelite settlers in Gilead were of the clan Machir.

Whom he married when he was threescore. — It is possible to see here a metaphorical statement of the fact that a branch of Hezronites amalgamated with the Machirites of Gilead. The “daughter of Machir” would then mean the clan so named. Comp. the expressions, “daughter of Zion” (Isaiah 37:22), “daughter of Judah” (Lamentations 1:15), “daughter of Babylon” (Isaiah 47:1).