A gens refers to a group of families who share a common ancestry and are connected through kinship ties. It can also refer to a clan or tribe.
Familia: This term refers to an individual family unit within a gens.
Nomen: The nomen is the name that identifies and distinguishes each gens.
Patria Potestas: Patria potestas is the legal power and authority that the paterfamilias (head of the family) has over his household members.