1 Chronicles 2:22

And Segub begat Jair ... — The Havothjair (tent-villages of Jair) are several times mentioned in the Pentateuch. In the passage Numbers 32:39 it is related — (1) That the Manassite clan of the sons of Machir took Gilead from the Amorites; (2) That Moses then formally assigned Giiead “to Machir son of Manasseh,” and the clan accordingly settled there; (3) That Jair son of Manasseh had taken their (i.e., the Amorite) tent-villages, and called them Havoth-jair. Comp. Deuteronomy 3:14 : “Jair son of Manasseh had taken all the region of Argob unto the bounds of the Geshurite and the Maacnathite; and he called them (that is, Bashan) after his own name, Havoth-jair, unto this day. And to Machir I gave Gilead.”

1 Chronicles 2:21 show a connection between Jair and the two tribes of Judah and Manasseh thus: —

Judah
|

Manasseh
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Pharez

Hezron married the daughter of Machir, chief of Gilead

Segub
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Jair

Jair is of course the name of a group of kindred families or clans, settled in the twenty-three cities.