Caspiacus
Could not find Caspiacae in Logeion dictionaries.
Caspiacae Proper-name adjective: feminine genitive singular, Proper-name adjective: feminine vocative plural, Proper-name adjective: feminine nominative plural, Proper-name adjective: feminine dative singular of Caspiacus
Caspĭăcus, a, um, Stat. S. 4, 4, 64, c. Caspius.