Diocleus
Could not find Diocleum in Logeion dictionaries.
Diocleum Proper-name adjective: masculine accusative singular, Proper-name adjective: neuter nominative singular, Proper-name adjective: neuter accusative singular of Diocleus
Dĭŏclēus, a, um, de Dioclès [médecin]: Cels. Med. 7, 5.