Cylleneus
Could not find Cylleneum in Logeion dictionaries.
Cylleneum 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 Cylleneus
Cyllēnēus, (14) a, um, du mont Cyllène, de Mercure : Ov. M. 11, 304 ; Hor. Epo. 13, 9.