Lewis & Short

Sōra, ae, f., the northernmost city of the Volsci in Latium, near Arpinum, on the Liris, still called Sora, Plin. 3, 5, 9, § 63; Liv. 7, 28; 9, 23 sq.; 10, 1; Vell. 1, 14, 5; Sil. 8, 396; Juv. 3, 223.
Hence, Sōrānus, a, um, adj., of or belonging to Sora, Soran: ager, Liv. 10, 14: transfuga, from Sora, id. 9, 24: Q. Varerius Soranus, Cic. de Or. 3, 11, 43; id. Brut. 46, 169: augur (jestingly, on account of the superstitious character of the Sorans), id. Div. 1, 47: COLONIA, i. e. Sora (as a Roman colony), Inscr. Orell. 3681.