Genealogics: Owain Fflam of Deheubarth (accessed 5 July 2023), citing Carl Boyer...

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Genealogics: Owain Fflam of Deheubarth (accessed 5 July 2023), citing Carl Boyer, 3rd, Medieval Welsh Ancestors of Certain Americans, Santa Clarita, 2004. Dr. Peter Clement Bartrum, Welsh Genealogies300-1400 8 vols and 1400-1500, 18 vols: Gruffudd ap Cynan 5.

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