Silianus
Could not find Silianam in Logeion dictionaries.
Silianam Proper-name adjective: feminine accusative singular of Silianus
Sīlĭānus, a, um, v. Silius.
Sīliānus, a, um, s. Sīlius.
Sīlĭānus, (14) a, um, de Silius : Cic. Att. 12, 31.