When copying data from this family tree, please include a reference to the origin: Stephen Clarke, "Clarke Family Tree", database, Genealogy Online (https://www.genealogieonline.nl/clarke-family-tree/I392494380549.php : accessed May 9, 2025), "Rhiwallon Prince of Powys North Wales 1063 ap Cynfyn (± 1000-1069)".
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