↑ Ormerod, George. On the Connexion of Arderne, or Arden, of Cheshire, with the Ardens of Warwickshire, in Topographer and Genealogist. (London: J.B. Nichols) Volume 1 pages 208 to 215.
...Eustace, whom Vincent (MSS. Coll. Arm., 10, p. 9 b) states to be son of Alexander, son of Agnes de Arden. On this last unauthenticated statement it is unnecessary to remark....