Cerbereus
Could not find Cerbereo in Logeion dictionaries.
Cerbereo Proper-name adjective: neuter dative singular, Proper-name adjective: masculine ablative singular, Proper-name adjective: masculine dative singular, Proper-name adjective: neuter ablative singular of Cerbereus
Cerbereumque canem nodat
Cerbereo dente teneor. qui dii mihi dent te!