_Owain ap Gruffydd DINEFWR _+
                                                             | (1190 - 1234)              
                              _Maredudd ab Owain DINEFWR ____|
                             | (1210 - 1265)                 |
                             |                               |____________________________
                             |                                                            
 _Owain ap Maredudd DINEFWR _|
| (1243 - 1275)              |
|                            |                                _Maelgwn ap Rhys DINEFWR ___+
|                            |                               | (1170 - 1230)              
|                            |_Ellen frerch Maelgwn DINEFWR _|
|                              (1225 - ....)                 |
|                                                            |____________________________
|                                                                                         
|
|--Llewelyn ab Owain DINEFWR 
|  (1275 - 1309)
|                                                             ____________________________
|                                                            |                            
|                             _______________________________|
|                            |                               |
|                            |                               |____________________________
|                            |                                                            
|_Angharad ferch OWAIN ______|
  (1245 - ....)              |
                             |                                ____________________________
                             |                               |                            
                             |_______________________________|
                                                             |
                                                             |____________________________