Final answer:
In a gang, a member with older brothers or fathers in the gang is referred to as paterfamilias, the authority figure who holds power and influence over younger members.
Step-by-step explanation:
A gang member who has older brothers or fathers in the gang is referred to as paterfamilias in Latin. The term 'father of the family' was used to describe the oldest man in a Roman family who held authority and made decisions about marriages. The paterfamilias in a gang is the leader figure who holds power and influence over younger members.