 
| Type | Valeur | 
|---|---|
| Titre | The Old World Progenitors of the Wyckoff Family: A Genealogy | 
| Wyckoff, William LeRoy and Hebert James Wyckoff. The Old World Progenitors of the Wyckoff Family: A Genealogy. Upper Darby, PA. 1936 | 
| Ealdgyth, widow of Gruffydd ap Llewelyn, Prince of Wales, and sister of Eadwine, Earl of the Mercians. pg 46 |