Ancestors of Mary Cook

The Royalty attached to the Cook side of my family is just speculative at this time. According to the book "The Tipton Family History" written by W. Hord Tipton, Kitty Bruce is supposedly the granddaughter of Frederick Lewis, Prince of Wales and her husband John Young supposedly descends from the Yong/Yonge families through the marriage of Ierwerth to Margaret Yonge whom are descendents of Tudor Trevor. These statements have not been proven to this date.