Inachius
Could not find Inachiumque in Logeion dictionaries.
Inachiumque Proper-name adjective: neuter vocative singular, Proper-name adjective: masculine genitive plural, Proper-name adjective: masculine accusative singular, Proper-name adjective: neuter genitive plural, Proper-name adjective: neuter nominative singular, Proper-name adjective: neuter accusative singular of Inachius
Īnachius, s. Īnachus.
Īnăchĭus, (12) a, um, dʼInachus, dʼIo : Virg. En. 7, 286 ; Ov. F. 3, 658 || dʼArgos, Argien : Virg. En. 11, 286 ; Ov. F. 5, 656.