Cosette is a fictional character in the novel Les Misérables by Victor Hugo and in the many adaptations of the story for stage, film, and television. Her birth name, Euphrasie, is only mentioned briefly. As an orphaned child of an unmarried mother deserted by her father, Hugo never gives her a surname. In the course of the novel, she is mistakenly identified as Ursule, Lark, or Mademoiselle Lanoire.