cyril
English: from the post-classical Greek name Kyrillos, a derivative of kyrios lord. It was borne by a large number of early saints, most notably the theologians Cyril of Alexandria and Cyril of Jerusalem. It was also the name of one of the Greek evangelists who brought Christianity to the Slavonic regions of Eastern Europe; in order to provide written translations of the gospels for their converts, they devised the alphabet still known as Cyrillic. In Ireland this has been used as an Anglicized form of the Gaelic name Coireall or Caireall (Old Irish Cairell). Cognate: Russian: Kirill.
A Dictionary of First Names, Oxford University Press, ISBN 0192800507