Margaret Stanley, Countess of Derby (b. 1540)
Margaret Stanley, Countess of Derby (née Lady Margaret Clifford; 1540 – 28 September 1596) was the only surviving daughter of Henry Clifford, 2nd Earl of Cumberland and Lady Eleanor Brandon. Her maternal grandparents were Charles Brandon, 1st Duke of Suffolk and Mary Tudor, Queen of France. Mary was the third daughter of King Henry VII of England and Elizabeth of York.