_Gruffudd ap Cynan ABERFFRAW ____+
                                                                         | (1055 - 1137) m 1082            
                                       _Cadwaladr ap Gruffudd ABERFFRAW _|
                                      | (1100 - 1172)                    |
                                      |                                  |_Angharad ferch Owain DINEFWR ___+
                                      |                                    (1065 - 1162) m 1082            
 _Cadfan ap Cadwaladr ABERFFRAW ______|
| (1140 - 1215)                       |
|                                     |                                   _________________________________
|                                     |                                  |                                 
|                                     |_Gwerfel ferch Gwrgan of UNKNOWN _|
|                                                                        |
|                                                                        |_________________________________
|                                                                                                          
|
|--Tangwystl ferch Cadfan ABERFFRAW 
|  (1212 - ....)
|                                                                         _Gruffydd ap Maredudd MATHRAFAL _+
|                                                                        |                                 
|                                      _Owain ap Gruffydd MATHRAFAL _____|
|                                     | (1130 - 1197)                    |
|                                     |                                  |_________________________________
|                                     |                                                                    
|_Gwenllian ferch Owain of MATHRAFAL _|
                                      |
                                      |                                   _________________________________
                                      |                                  |                                 
                                      |__________________________________|
                                                                         |
                                                                         |_________________________________