Thebaeus
Could not find Thebaeis in Logeion dictionaries.
Thebaeis Proper-name adjective: neuter ablative plural, Proper-name adjective: feminine ablative plural, Proper-name adjective: masculine ablative plural, Proper-name adjective: neuter dative plural, Proper-name adjective: feminine dative plural, Proper-name adjective: masculine dative plural of Thebaeus
Thēbaeus, a, um, s. Thēbae.
Thēbæus, a, um, de Thèbes [en Égypte] : Claud. Idyll. 1, 91.