Cassian, John (c. 360-after 430), monk. Acc. to *Gennadius, Cassian was ‘natione Scytha’, i.e. born in the Roman province of Scythia Minor (modern Dobrudja); this statement is prob. correct, despite the doubts of some scholars. As a young man he joined a monastery at *Bethlehem, but left soon after (c.