_Ferdinand AVIZ ___________+
                                                    | (1433 - 1470) m 1447      
                          _Manuel I AVIZ ___________|
                         | (1469 - 1521)            |
                         |                          |_Beatrice of AVIZ _________+
                         |                            (1430 - 1506) m 1447      
 _John III AVIZ _________|
| (1502 - 1557)          |
|                        |                           _Ferdinand II TRASTÁMARA _+
|                        |                          | (1451 - 1515) m 1469      
|                        |_Maria of TRASTÁMARA ____|
|                          (1482 - 1516)            |
|                                                   |_Isabella I TRASTÁMARA ___+
|                                                     (1451 - 1504) m 1469      
|
|--John Manuel AVIZ 
|  (1537 - 1553)
|                                                    _Maximilian I HABSBURG ____+
|                                                   | (1458 - 1518)             
|                         _Philip I HABSBURG _______|
|                        | (1478 - 1506)            |
|                        |                          |_Mary of VALOIS-BURGUNDY __+
|                        |                            (1456 - 1482)             
|_Catherine of HABSBURG _|
  (1506 - 1577)          |
                         |                           _Ferdinand II TRASTÁMARA _+
                         |                          | (1451 - 1515) m 1469      
                         |_Joanna I of TRASTÁMARA _|
                           (1479 - 1555)            |
                                                    |_Isabella I TRASTÁMARA ___+
                                                      (1451 - 1504) m 1469