Origin of CyrilLate Latin Cyrillus from Classical Greek Kyrillos, literally , lordly from kyrios, a lord: see church
- ( 376?-444); Christian theologian: archbishop of Alexandria (412-444): his day is June 27
- (born Constantine) ( 827?-869); Gr. prelate & missionary; apostle to the Slavs: his day is Feb. 14
- A male given name; best known for a ninth century missionary to the Slavs.
Via Late Latin Cyrillus, from Ancient Greek Κύριλλος (Kýrillos), from κύριος (lord, master).