What is "haydee"

Haydée, ou Le secret is an opéra comique by the French composer Daniel Auber, first performed by the Théâtre Royal de l'Opéra-Comique at the Salle Favart in Paris on 28 December 1847. The libretto (in three acts) is by Auber's regular collaborator, Eugène Scribe and is based on a short story by Prosper Mérimée, La Partie de trictrac (1830).

The opera was performed regularly by the Opéra-Comique up to the end of the 19th century, achieving over 520 performances there.

Haydée (also Haydee, Haidée, or Haidee) is a name.