What does 1 Chronicles 5:11 mean?

and Bela the son of Azaz, the son of Shema, the son of Joel, who lived in Aroer, even to Nebo and Baal Meon;

and he lived eastward even to the entrance of the wilderness from the river Euphrates, because their livestock were multiplied in the land of Gilead.

In the days of Saul, they made war with the Hagrites, who fell by their hand; and they lived in their tents throughout all the land east of Gilead.

Joel the chief, Shapham the second, Janai, and Shaphat in Bashan.

Their brothers of their fathers’ houses: Michael, Meshullam, Sheba, Jorai, Jacan, Zia, and Eber, seven.

These were the sons of Abihail, the son of Huri, the son of Jaroah, the son of Gilead, the son of Michael, the son of Jeshishai, the son of Jahdo, the son of Buz;