Lewis & Short

Ăpĕrantĭa, ae, f., = Ἀπεραντία, a small province in Thessaly, south of the Dolopians, Liv. 36, 33; 38, 3; cf. Mann. Greece, 39.
Hence, Ăpĕrantĭi, ōrum, m., its inhabitants, Liv. 43, 22.