1General. Richardson, Douglas, Plantagenet Ancestry: A Study in Colonial and Medieval Families (Baltimore: Genealogical Publishing Company, 2004.), p. 218.
2General. Richardson, Douglas, Magna Carta Ancestry: A Study in Colonial and Medieval Families (Baltimore: Genealogical Publishing Co., 2005.), p. 221.
1General. Richardson, Douglas, Plantagenet Ancestry: A Study in Colonial and Medieval Families (Baltimore: Genealogical Publishing Company, 2004.), p. 553.
1General. John Edward Lloyd (1911). A history of Wales: from the earliest times to the Edwardian conquest. Longmans, Green & Co.
1General. John Edward Lloyd (1911). A history of Wales: from the earliest times to the Edwardian conquest. Longmans, Green & Co.
Bleddyn ap CYNFYN Prince of Gwynedd and of Powys
1General. R.R. Davies (1991). The age of conquest: Wales 1063-1415. O.U.P. ISBN 0-19-820198-2.