_Tewdwr ap Caddell DINEFWR _____+
                                                                           | (1000 - 1093)                  
                                       _Rhys ap Tewdwr DINEFWR ____________|
                                      | (1040 - 1093)                      |
                                      |                                    |_Gwenllian verch Gwyn of DYFED _
                                      |                                                                     
 _Gruffydd ap Rhys DINEFWR ___________|
| (1090 - 1137)                       |
|                                     |                                     _Rhiwallon ap Cynfyn MATHRAFAL _+
|                                     |                                    | (1025 - 1070) m 1050           
|                                     |_Gwladys ferch Rhiwallon MATHRAFAL _|
|                                       (1060 - 1137)                      |
|                                                                          |_Faelis ferch LLYWELYN _________
|                                                                             m 1050                        
|
|--Owain ap Gruffydd DINEFWR 
|  
|                                                                           _Cynan ap Iago ABERFFRAW _______+
|                                                                          | (1014 - 1063)                  
|                                      _Gruffudd ap Cynan ABERFFRAW _______|
|                                     | (1055 - 1137) m 1082               |
|                                     |                                    |_Ragnaillt of DUBLIN ___________
|                                     |                                                                     
|_Gwenllian verch Gruffydd ABERFFRAW _|
  (1097 - 1136)                       |
                                      |                                     _Owain ap Edwin DINEFWR ________+
                                      |                                    |                                
                                      |_Angharad ferch Owain DINEFWR ______|
                                        (1065 - 1162) m 1082               |
                                                                           |________________________________