Cynthius
Could not find Cynthium in Logeion dictionaries.
Cynthium Proper-name adjective: neuter vocative singular, Proper-name adjective: masculine genitive plural, Proper-name noun: masculine genitive plural, Proper-name adjective: neuter nominative singular, Proper-name adjective: neuter accusative singular, Proper-name adjective: masculine accusative singular, Proper-name adjective: neuter genitive plural, Proper-name noun: masculine accusative singular of Cynthius
Cynthĭus, (13) ĭī, m. , Apollon [honoré sur le mont Cynthus] : Virg. B. 6, 3.