Lucille is a variant of Lucia, or Lucy. Lucy originates in Latin language and means "light of the day". It is ultimately derived from Lucia, the feminine form of Lucius. Lucy has always been one of the most popular feminine given names in the English-speaking countries and in variant spelling all over the world. Saint Lucy, or Lucia, was the 3rd century Christian martyr and patron saint of the blind. More recently, the famous bearer is the American actress Lucy Liu.