Cythereius
Could not find Cythereia in Logeion dictionaries.
Cythereia Proper-name adjective: neuter nominative plural, Proper-name adjective: neuter vocative plural, Proper-name adjective: feminine nominative singular, Proper-name adjective: feminine ablative singular, Proper-name adjective: neuter accusative plural, Proper-name adjective: feminine vocative singular of Cythereius
Cўthĕrēĭus (Κυθερήιος), et Cўthērĭăcus, a, um, de Cythère, de Vénus : Ov. M. 10, 529 ; H. 7, 60 ; Cythereius heros Ov. M. 13, 625, Énée ; mensis Ov. F. 4, 195, le mois dʼavril [consacré à Vénus].