Σῑθωνία · Sithōnia — LSJ
Sithonia, land of the Sithones, a part of Thrace, Hdt. 7.122: Σῑθώνιος, α, ον, Sithonian, St.Byz.; Σῑθών, όνος and ῶνος, ὁ, a Thracian, Lyc. 1357,583; Σῑθωνίς, ίδος, ἡ, a Thracian woman, Nonn. D. 13.336. [Some forms in ο are used by Poets, Σῑθονίη Euph. 58, Σῑθονίς Nonn. D. 48.113.]