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 _Maelgwn Fychan of DEHEUBARTH _____|
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|--Elen ferch Maelgwn of DEHEUBARTH 
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|                                                                      _Iorwerth ap OWAIN ABERFFRAW ___+
|                                                                     | (1130 - 1174)                  
|                                    _Llewelyn ap Iorwerth ABERFFRAW _|
|                                   | (1173 - 1240)                   |
|                                   |                                 |_Margred ferch Madog MATHRAFAL _+
|                                   |                                   (1150 - 1198)                  
|_Angharad ferch Llewlyn ABERFFRAW _|
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                                    |                                  _John Lackland PLANTAGENET _____+
                                    |                                 | (1166 - 1216)                  
                                    |_Joan of PLANTAGENET ____________|
                                      (1188 - 1236)                   |
                                                                      |_Clemence PINEL ________________