Origin of the name Cecily:

Feminine form of Cecil, which is derived from Caecilius, an old Roman family name, which has its root in the Latin caecus (blind, dim-sighted). The name was borne by a 3rd-century Christian who founded a church in the Trastevere section of Rome. During the 6th century, a story of her life was written and she was henceforth venerated as a martyr. She is regarded as the patron saint of musicians.

From A World of Baby Names by Teresa Norman. Buy the book