All these names were written down in the family history. They were written during the time when Jotham was king of Judah and Jeroboam was king of Israel.
And Beerah was the son of Baal. Beerah was a leader of the people of Reuben. Tiglath-Pileser took Beerah as a prisoner to another country. Tiglath-Pileser was the king of Assyria.