_Rhys ap Tewdwr DINEFWR ____________+
                                                                         | (1040 - 1093)                      
                                    _Gruffydd ap Rhys DINEFWR ___________|
                                   | (1090 - 1137)                       |
                                   |                                     |_Gwladys ferch Rhiwallon MATHRAFAL _+
                                   |                                       (1060 - 1137)                      
 _Rhys ap Gruffydd DINEFWR ________|
| (1130 - 1197)                    |
|                                  |                                      _Gruffudd ap Cynan ABERFFRAW _______+
|                                  |                                     | (1055 - 1137) m 1082               
|                                  |_Gwenllian verch Gruffydd ABERFFRAW _|
|                                    (1097 - 1136)                       |
|                                                                        |_Angharad ferch Owain DINEFWR ______+
|                                                                          (1065 - 1162) m 1082               
|
|--Maredudd ap Rhys DINEFWR 
|  (.... - 1239)
|                                                                         _Maredudd ap Bleddyn MATHRAFAL _____+
|                                                                        | (1047 - 1131)                      
|                                   _Madog ap Maredudd MATHRAFAL ________|
|                                  | (1091 - 1159)                       |
|                                  |                                     |_Hunedd ferch EINUDD _______________
|                                  |                                       (1063 - 1132)                      
|_Gwenllian ferch Madog MATHRAFAL _|
                                   |
                                   |                                      _Gruffudd ap Cynan ABERFFRAW _______+
                                   |                                     | (1055 - 1137) m 1082               
                                   |_Susanna ferch Gruffudd ABERFFRAW ___|
                                     (1106 - 1165)                       |
                                                                         |_Angharad ferch Owain DINEFWR ______+
                                                                           (1065 - 1162) m 1082