Mid 16th century (in an earlier sense). From classical Latin Moesī (Hellenistic Greek Μοισοί), the name of the people of Moesia (goes to Moesia, the name of the region) + -an.
Definition of Moesian in US English:
Moesian
adjective
Of or belonging to Moesia.
Origin
Mid 16th century (in an earlier sense). From classical Latin Moesī (Hellenistic Greek Μοισοί), the name of the people of Moesia (goes to Moesia, the name of the region) + -an.