_John I AVIZ _____________+
                                                | (1357 - 1433) m 1387     
                       _Edward AVIZ ____________|
                      | (1391 - 1438)           |
                      |                         |_Philippa of LANCASTER ___+
                      |                           (1360 - 1415) m 1387     
 _Alfonso V AVIZ _____|
| (1431 - 1481)       |
|                     |                          _Ferdinand I TRASTÁMARA _+
|                     |                         | (1380 - 1416)            
|                     |_Eleonor of TRASTÁMARA _|
|                       (1402 - 1444)           |
|                                               |_Eleanor of IVREA ________+
|                                                 (1374 - 1435)            
|
|--John II AVIZ 
|  (1454 - 1495)
|                                                _John I AVIZ _____________+
|                                               | (1357 - 1433) m 1387     
|                      _Peter AVIZ _____________|
|                     | (1392 - 1449) m 1429    |
|                     |                         |_Philippa of LANCASTER ___+
|                     |                           (1360 - 1415) m 1387     
|_Isabel of AVIZ _____|
  (1431 - 1455)       |
                      |                          _James II BARCELONA ______+
                      |                         | (1380 - 1433)            
                      |_Isabella of BARCELONA __|
                        (1408 - 1459) m 1429    |
                                                |_Isabella of BARCELONA ___+
                                                  (1376 - 1424)