Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Călypso, ūs (e. g. Tib. 4, 1, 77; Plin. 3, 10, 15, § 96; Serv. ad Verg. A. 3, 171: Calypsonis, App. M. 1, p. 107; Macr. S. 5, 2, 10; acc. regularly Calypso, Ov. P. 4, 10, 13; cf. Quint. 1, 5, 63; Plin. ap. Charis. p. 102 P.; Prisc. p. 685 ib.; Rudd. I. p. 60, n. 84; but Calypsonem, Liv. And. ap. Prisc. l. l., and Calypsonem, Pac. ib., and ap. Charis. p. 47 P.; Caes. ap. Quint. 1, 5, 63; Macr. S. 5, 2, 10), f., = Καλυψώ, a nymph, daughter of Atlas (or Oceanus), who ruled in the Island Ogygia, Plin. 3, 10, 15, § 96 (acc. to Mel. 2, 7, 18, erroneously, in Aeaea), in the Sicilian Sea, she received Ulysses as a guest, bore by him Auson (v. Auso-nes), and, with the greatest unwillingness, allowed him to continue his voyage, Tib. 4, 1, 77; Ov. P. 4, 10, 13; Cic. Off. 1, 31, 113; Prop. 1, 15, 9; 2 (3), 21, 13.