Rashi on Numbers 32:41/רש"י על במדבר ל״ב:מ״א

1חותיהם This is rendered in the Targum by THEIR VILLAGES.

2ויקרא אתהן חות יאיר AND HE CALLED THEM “THE VILLAGES OF JAIR” — Because he had no children, he named them after himself, as a memorial.