John Gill Commentary Numbers 32:41

"And Jair the son of Manasseh went and took the towns thereof, and called them Havvoth-jair." — Numbers 32:41 (ASV)

And Jair the son of Manasseh
By his mother's side, otherwise he was of the family of Judah; for Hezron, of the family of Judah, married a daughter of Machir, the son of Manasseh, by whom he had a son called Segub, who was the father of Jair, (1 Chronicles 2:21 1 Chronicles 2:22) , the same

went and took the small towns thereof ;
of that part of Gilead given to Machir:

and called them Havothjair ;
after his own name: in (Deuteronomy 3:14) , they are called Bashanhavothjair.