LSJ
ἡ, goddess worshipped in Thessaly (= Λευκοθέα), IG 9(2).422 (Pherae), Ἀρχ. Ἐφ. 1910.380 (Larissa). neut. pl. Λευκάθεα, τά, festival at Teos, CIG 3066.25; — hence Λευκαθεών, ῶνος (sc. μήν), ὁ, month at Chios, GDI 5661.25 (iv BC); at Teos, Supp.Epigr. 2.579.21 (iv BC); at Magnesia on Maeander, Inscr.Magn. 89.6; — also Λευκαθιών, at Lampsacus, CIG 3641b17; Λευκάθεος, at Astypalaea, SIG 780 (i BC).
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)