'Families' in the Bible

These be the heads of their fathers' houses: The sons of Reuben the firstborn of Israel; Hanoch, and Pallu, Hezron, and Carmi: these be the families of Reuben.

And the sons of Simeon; Jemuel, and Jamin, and Ohad, and Jachin, and Zohar, and Shaul the son of a Canaanitish woman: these are the families of Simeon.

The sons of Gershon; Libni, and Shimi, according to their families.

And the sons of Merari; Mahali and Mushi: these are the families of Levi according to their generations.

And the sons of Korah; Assir, and Elkanah, and Abiasaph: these are the families of the Korhites.

And Eleazar Aaron's son took him one of the daughters of Putiel to wife; and she bare him Phinehas: these are the heads of the fathers of the Levites according to their families.

Then Moses called for all the elders of Israel, and said unto them, Draw out and take you a lamb according to your families, and kill the passover.