_Duarte AVIZ ___________+
| (1391 - 1438)
_Ferdinand AVIZ ___________|
| (1433 - 1470) m 1447 |
| |_Leonor of TRASTÁMARA _
| (1402 - 1444)
_Manuel I AVIZ _______________|
| (1469 - 1521) |
| | _John AVIZ _____________+
| | | (1399 - 1442)
| |_Beatrice of AVIZ _________|
| (1430 - 1506) m 1447 |
| |_Isabella of BRAGANZA __+
| (1402 - 1466)
|
|--John III AVIZ
| (1502 - 1557)
| _John II TRASTÁMARA ___+
| | (1398 - 1478)
| _Ferdinand II TRASTÁMARA _|
| | (1451 - 1515) m 1469 |
| | |_Juana ENRÍQUEZ _______+
| | (1425 - 1467)
|_Maria of TRASTÁMARA-ARAGON _|
(1482 - 1516) |
| _John II TRASTÁMARA ___+
| | (1404 - 1454)
|_Isabella I TRASTÁMARA ___|
(1451 - 1504) m 1469 |
|_Isabella of AVIZ ______+
(1428 - 1496)