_Peter I BURGUNDY __________+
                                                    | (1320 - 1366)              
                         _John I AVIZ ______________|
                        | (1357 - 1433) m 1387      |
                        |                           |_Teresa LOURENÇO __________
                        |                                                        
 _John AVIZ ____________|
| (1399 - 1442)         |
|                       |                            _John of Gaunt PLANTAGENET _+
|                       |                           | (1339 - 1398)              
|                       |_Philippa of LANCASTER ____|
|                         (1360 - 1415) m 1387      |
|                                                   |_Blanche of PLANTAGENET ____+
|                                                     (1342 - 1368)              
|
|--Isabella of AVIZ 
|  (1428 - 1496)
|                                                    _John I AVIZ _______________+
|                                                   | (1357 - 1433)              
|                        _Afonso I BRAGANZA ________|
|                       | (1377 - 1461) m 1400      |
|                       |                           |_Inés PIRES _______________
|                       |                                                        
|_Isabella of BRAGANZA _|
  (1402 - 1466)         |
                        |                            ____________________________
                        |                           |                            
                        |_Beatriz PEREIRA DE ALVIM _|
                          (1380 - 1414) m 1400      |
                                                    |____________________________