Quick answer
Cosette is a girl name meaning "little thing".
Pronunciation: French /kɔ.zɛt/.
Meaning and history
From French chosette meaning "little thing". This is the nickname of the illegitimate daughter of Fantine in Victor Hugo's novel Les Misérables (1862). Her real name is Euphrasie, though it is seldom used. In the novel young Cosette is the ward of the cruel Thénardiers until she is retrieved by Jean Valjean.
Notes and context
Usage: french, literature