Ὀρέσθειον
Could not find Ὀρεσθασίων in Logeion dictionaries.
Ὀρεσθασίων proper-name adjective feminine genitive plural, proper-name adjective masculine genitive plural, proper-name adjective neuter genitive plural of Ὀρεσθάσιος
Ὀρέσθειον, ου (τὸ) Orestheion, v. d’Arcadie, Thc. 5, 64.