Origin: 1585–95; earlier boiaren < Russian boyárin, akin to OCS bolyarinŭ (translating Greek megistán man of high status), Bulgarian bolyár(in); of disputed orig.
1590s, "member of a Russian aristocratic class (abolished by Peter the Great)," from Rus. boyarin, perhaps from boji "struggle," or from O.Slav. root bol- "great."