_Edward II PLANTAGENET _+
                                                       | (1284 - 1327) m 1307   
                              _Edward III PLANTAGENET _|
                             | (1312 - 1377) m 1327    |
                             |                         |_Isabella of CAPET _____+
                             |                           (1292 - 1358) m 1307   
 _John of Gaunt PLANTAGENET _|
| (1339 - 1398)              |
|                            |                          _William III AVESNES ___+
|                            |                         | (1286 - 1337)          
|                            |_Philippa of AVESNES ____|
|                              (1311 - 1369) m 1327    |
|                                                      |_Joan of VALOIS ________+
|                                                        (1294 - 1341)          
|
|--Catherine of LANCASTER 
|  (1373 - 1418)
|                                                       _Alfonso XI BURGUNDY ___+
|                                                      | (1311 - 1350) m 1328   
|                             _Peter IVREA ____________|
|                            | (1334 - 1368)           |
|                            |                         |_Maria of BURGUNDY _____+
|                            |                           (1312 - 1356) m 1328   
|_Constance of IVREA ________|
  (1354 - 1393)              |
                             |                          ________________________
                             |                         |                        
                             |_Maria of PADILLA _______|
                                                       |
                                                       |________________________