The Groan family is a fictional family from the popular children's book series called The Worst Witch, written by Jill Murphy. They are known for their humorous and chaotic adventures at a magical school for witches. The family consists of several members, including the main character, Mildred Hubble, who often finds herself in trouble due to her clumsiness and lack of magical skills. The Groan family is characterized by their quirky personalities and the challenges they face in a world filled with magic. Their interactions with other characters, such as Miss Cackle and Enid, highlight themes of friendship, perseverance, and the importance of being true to oneself.