Lewis & Short

Sacrŏvir, i, m. Julius Sacrovir, a nobleman of the Hœdui in Gaul, Tac. A. 3, 40; 3, 44 al.
Hence, Sacrŏvĭrĭānus, a, um, adj., of or named from Sacrovir: bellum, Tac. A. 4, 18.