Fontēius, a, the name of a Roman gens. So M. Fonteius, a praetor in Gaul, in defence of whom Cicero delivered the oration still preserved in part, Cic. Att. 1, 6, 1. His sister Fonteia, a vestal, Cic. Font. 17, 37.

—Fontēiānus, a, um, adj., of or belonging to Fonteius, Cic. Harusp. 27, 57.