'Families' in the Bible

I stationed the people behind the deepest part of the wall in the open places according to their families, with their swords, spears, and bows.

Now some from the heads of the {families} gave to the work. The governor gave to the storehouse one thousand darics of gold, fifty basins, and five hundred and thirty priestly tunics.

Now some of the heads of the {families} gave to the storehouse of the work twenty thousand gold darics and two thousand two hundred silver minas.

On the second day the heads of the {families} of all the people, the priests, and the Levites gathered together to Ezra the scribe to study the words of the law.

and his brothers, heads of the {families}, two hundred and forty-two. And Amashai son of Azarel, son of Ahzai, son of Meshillemoth, son of Immer,

Now in the days of Jehoiakim the priests and the heads of the {families} were: of Seraiah, Meraiah; of Jeremiah, Hananiah;

In the days of Eliashib, Jehoiada, Jehohanan, and Jaddua the Levites were recorded as heads of the {families}. So [these were] the priests [during] the reign of Darius the Persian.

The descendants of Levi and the heads of the {families} were recorded in the scroll of the Annals until the days of Jehohanan son of Eliashib.