_Gruffudd ap Cynan ABERFFRAW ________+
                                                                | (1055 - 1137) m 1082                
                              _Owain ap Gruffudd ABERFFRAW _____|
                             | (1100 - 1170)                    |
                             |                                  |_Angharad ferch Owain DINEFWR _______+
                             |                                    (1065 - 1162) m 1082                
 _Rhodri ap Owain GWYNEDD ___|
| (1147 - 1195)              |
|                            |                                   _Gronwy ap OWAIN ____________________+
|                            |                                  |                                     
|                            |_Cristin ferch GORNWY ____________|
|                              (1105 - ....)                    |
|                                                               |_____________________________________
|                                                                                                     
|
|--Thomas ap Rhodri GWYNEDD 
|  
|                                                                _Gruffydd ap Rhys DINEFWR ___________+
|                                                               | (1090 - 1137)                       
|                             _Rhys ap Gruffydd DINEFWR ________|
|                            | (1130 - 1197)                    |
|                            |                                  |_Gwenllian verch Gruffydd ABERFFRAW _+
|                            |                                    (1097 - 1136)                       
|_Annest ferch Rhys DINEFWR _|
                             |
                             |                                   _Madog ap Maredudd MATHRAFAL ________+
                             |                                  | (1091 - 1159)                       
                             |_Gwenllian ferch Madog MATHRAFAL _|
                                                                |
                                                                |_Susanna ferch Gruffudd ABERFFRAW ___+
                                                                  (1106 - 1165)