Who was the dad to the wife of Sir Richard Pole?
Sir Richard Pole:  He was created a Knight of the Garter and was married to Margaret Pole, Countess of Salisbury, a member of the Plantagenet dynasty: a marriage which reinforced the Tudor alliance between the houses of Lancaster and York. Margaret Pole, Countess of Salisbury:  She was the daughter of George, Duke of Clarence, the brother of kings Edward IV and Richard III.
George, Duke of Clarence