Lewis & Short

Hispellum, i, n., a city of Umbria, at the foot of the Apennines, now Spello, Plin. 3, 14, 19, § 113; Sil. 8, 458; Inscr. Orell. 3885.
Hispellātes, ium, m., the inhabitants of Hispellum, Plin. Ep. 8, 8, 6.