Cassian \c(a)-ssian\ as a boy's name is pronounced KASH-en. It is of Latin origin. From clan name Cassianus, an elaboration of Cassius. Name of several early saints.

Baby names that sound like Cassian are Cason and Ghassan. Other similar baby names are Caspian, Carsan, Cassidy, Cassiel, Cassio, Hassan and Ossian.