_Griffith ap Gwilym of GWYNEDD _+
                                                            | (1342 - 1405)                  
                            _Gwilym ap Griffith of GWYNEDD _|
                           | (1360 - 1431)                  |
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 _Tudur Fychan of GWYNEDD _|
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|                          |                                 _Goronwy ap Tudur GWYNEDD ______+
|                          |                                | (.... - 1382)                  
|                          |_Morfydd ferch Goronwy GWYNEDD _|
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|
|--Owain Tudor GWYNEDD 
|  (.... - 1504)
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