“After him came Jair the Gileadite, who judged Israel twenty-two years. He had thirty sons who rode on thirty donkeys. They had thirty towns, which are in the land of Gilead called Havvoth-jair to this day. Jair died, and was buried in Kamon.”
There are a number of people called Jair in the biblical literature. The Gileadites were east Jordan inhabitants in the Manasseh territory. In a nice alliteration or use of 30, 30 sons had 30 donkeys in 30 towns. Havvoth-jair included tent villages. Jair ruled as judge for 22 years. He was judge #7.