Seianianus
Could not find Seianianum in Logeion dictionaries.
Seianianum 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 Seianianus
Sējānĭānus, a, um, and Sējānus, a, um; v. Sejus.
Sēiāniānus u. Sēiānus, s. Sēius.