How long was Margaret Stanley, Countess of Derby's father's family seated at Skipton Castle?
Margaret Clifford, Countess of Derby: 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. Henry Clifford, 2nd Earl of Cumberland: Henry Clifford, 2nd Earl of Cumberland (1517 – January 1570) was a member of the Clifford family, seated at Skipton Castle from 1310 to 1676.
from 1310 to 1676