Hogwarts Dream-cast | Cate Blanchett as Queen Maeve
Queen Maeve was a famous witch who lived in Medieval times. Before the establishment of Hogwarts School of Witchcraft and Wizardry, she was involved in the training of young wizards and witches in her native Ireland. She was immortalised on a Chocolate Frog Card.
Her title may indicate she´s muggle-born or half-blood, as Remus Lupin mentions there are no princes in the wizarding world and thus, probably no queens or it means that she married a muggle king.
Me personally, I believe her role have influenced the founding of Hogwarts, which is why I did this dream-role.