Cyril is the name of several historic figures:

• Saint Cyril -- "godfather" of Cyrillic 800 A.D.
• Saint Cyril of Alexandria -- Archbishop of Alexandria 412 A.D.
• Saint Cyril of Jerusalem -- Theologian 315-380 A.D.
• Cyril of Turaw -- see the history of Belarus

The name Cyril is from Gk. Kyrillos , lit. lordly , masterful , related to kyrios = lord, master. In Hebrew it's Adonis.