Lewis & Short

Sāso (Sāson), ōnis, f., = Σάσων, Σάσω, a small island near the promontory Acroceraunia, on the coast of Illyria, now Saseno, Plin. 3, 26, 30, § 152; Luc. 2, 627; 5, 650; Sil. 7, 480.