(adjective) : Arcānus, a, um, Arcae * Of or pertaining to Arcoe hence, subst. * Arcāni, ōrum, m., the inhabitants of Arcoe, Inscr. Orell. 4007. * Arcānum, i, n., a villa of Q. Cicero, in the neighborhood of Arcoe, Cic. Att. 5, 1; id. ad Q. Fr. 3, 1 al.
Charlton T. Lewis, Charles Short, A Latin Dictionary
PIR
Male Personal name Confirmed occurences in the Roman Empire:
L. Aemilius Arcanus (Masc, senator), ref: PIR A 0333 | PIR ID967