"Variant of Damian"
The name Demian is commonly a male name from the "Greek" origin.
Demian is the German spelling of Damian, a name that goes back to the Greek Damianos, from damao, to tame or subdue. It is the form used in German-speaking Europe and is the title of Hermann Hesse's 1919 novel Demian. Russian uses the related form Demyan.
Damian means "Constant, One who tames|Spirit".
The pronunciation of Demian is deh-MEE-uhn.