Maisie Cattermole was the daughter of Mary and Reginald Cattermole. She had a brother, Alfred, and a sister, Ellie. She lived at 27 Chislehurst Gardens, Great Tolling, Evesham with her parents, brother and sister.
Her mother told the Ministry that Ellie and her brother and sister were at home. They were probably not attending Hogwarts yet, because Harry Potter told her and her husband to pick up the children and run away.