_Ferdinand I TRASTÁMARA _____+
| (1380 - 1416)
_John II TRASTÁMARA _|
| (1398 - 1478) |
| |_Eleanor of IVREA ____________+
| (1374 - 1435)
_Ferdinand II TRASTÁMARA _|
| (1451 - 1515) m 1469 |
| | _Fadrique ENRÍQUEZ __________+
| | | (1390 - 1473)
| |_Juana ENRÍQUEZ _____|
| (1425 - 1467) |
| |_Mariana Fernández of AYALA _
| (1394 - 1431)
|
|--Isabella of TRASTÁMARA
| (1470 - 1498)
| _Henry III TRASTÁMARA _______+
| | (1379 - 1406)
| _John II TRASTÁMARA _|
| | (1404 - 1454) |
| | |_Catherine of LANCASTER ______+
| | (1373 - 1418)
|_Isabella I TRASTÁMARA ___|
(1451 - 1504) m 1469 |
| _John AVIZ ___________________+
| | (1399 - 1442)
|_Isabella of AVIZ ____|
(1428 - 1496) |
|_Isabella of BRAGANZA ________+
(1402 - 1466)