"Variant of Lucille"
The name Lucielle is commonly a female name from the "French" origin.
Lucielle is a spelling variant of Lucille, the French form of the Latin name Lucilla, a feminine diminutive of Lucius. Lucius is connected with the Latin word lux, meaning light, so Lucille and its variants are usually described with that sense. Lucielle does not have a separate origin of its own.
Lucille means "Bringer of light. The feminine form of Luke.".
The pronunciation of Lucielle is loo-see-EL.