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Family:
Bibliography
  1. Cokayne, George Edward, Complete Peerage of England, Scotland, Ireland, Great Britain, and the United Kingdom, extant, extinct, or dormant, vol 10, Oakham-Richmond. London: St Catherine Press, 1945. Reprinted (4 per page) Gloucester: A Sutton, 1982. Available at https://familysearch.org/search/catalog/271412 Information from this source tagged as [Ref: CP X [Ap][p0-9].*].

Sources for birth and parent Information
parents:
[Ref: CP X p437(h)]
Research Notes:



Pedigree of William De PERCY
                   /-----(Unk) De PERCY
          /-----William Algernon De PERCY, Baron Of Topcliffe
 /-----Richard De PERCY
|        |                  /-----(Unk) De PORT
|        |         /-----Hugh De PORT, Baron Of Basing
|         \-----Emma De PORT
|                  \-----Orence
William De PERCY
 \-----Alice



Descendants of William De PERCY
1. William De PERCY