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