LSJ
ἡ, title of Athena who was worshipped at Ἴτων in Thessaly, Hecat. 2J., Paus. 1.13.3, 10.1.10; χρυσαιγίδος Ἰτωνίας ναός B. Fr. 11.2; also at Coronea, Plb. 4.25.2, 25.3.2, Str. 9.2.29, Paus. 9.33.1; at Athens, IG1². 310.217; at Amorgos, ib. 12(7).33 (ii BC); — also Ἰτωνιάς, ἡ, Call. Cer. 75, AP 9.743 (Theodorid.); Ἰτωνίς, ἡ, A.R. 1.551, AP 6.130 (<Leon.>).
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)