Apolline Delacour was the wife of Monsieur Delacour and the mother of Fleur and Gabrielle Delacour. She was half veela.
Madame Delacour was present for the Third Task of the Triwizard Tournament held at Hogwarts (GF31).
She also attended the wedding of her daughter, Fleur, to Bill Weasley (DH8).
Madame Delacour is described as being a beautiful blonde woman and accomplished at household spells (DH6).
accomplished at household spells (DH6)
Apolline = more than likely derived from the male Apollo who was, among other things, the god of beauty.