Cyril \cy-ril\ as a boy's name is pronounced SEER-el. It is of Greek origin, and the meaning of Cyril is "master, lord". From Kyrillos, which is derived from "kyrios". The name of at least eight saints, including the theologians Cyril of Alexandria and Cyril of Jerusalem, and a Greek evangelist who brought Christianity to the Slavic-speaking regions of Eastern Europe. Cyrille is the French form. Actor Cyril Ritchard.