_Gwilym ap Griffith of GWYNEDD _+
                                                  | (1360 - 1431)                  
                        _Tudur Fychan of GWYNEDD _|
                       |                          |
                       |                          |_Morfydd ferch Goronwy GWYNEDD _+
                       |                                                           
 _Owain Tudor GWYNEDD _|
| (.... - 1504)        |
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|--William Owen GWYNEDD 
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