'Fathers' in the Bible

Now these were the ones who came up from Tel-melah, Tel-harsha, Cherub, Addan, and Immer, but they were not able to prove their fathers' household and their descent, if they were from Israel:

The {returned exiles} did so. Ezra the priest selected men, the heads of the {families} according to the house of their fathers, all of them by name. They sat down to examine the matter on the first day of the tenth month.