Ἔρεσος
Ἔρεσος, (f., city) Eresos
Could not find Ἐρέσῳ in Logeion dictionaries.
Ἐρέσῳ Proper-name noun: feminine dative singular of Ἔρεσος
Ἔρεσος — Eresos (Lesbos), Pleiades 550533
Ἔρεσος, ου (ἡ) Érésos (auj. Eresós) v. de Lesbos, Thc. 3, 18, etc. ; Dém. 17, 7 Baiter-Sauppe, etc.