Ὀρέσθειον
Could not find Ὀρεσθάσιον in Logeion dictionaries.
Ὀρεσθάσιον proper-name adjective masculine accusative singular, proper-name adjective neuter nominative singular, proper-name adjective neuter vocative singular, proper-name adjective neuter accusative singular of Ὀρεσθάσιος
Ὀρέσθειον, ου (τὸ) Orestheion, v. d’Arcadie, Thc. 5, 64.