_Alfonso V TRASTÁMARA _+ | (1396 - 1458) _Ferdinand I TRASTÁMARA _| | (1423 - 1493) | | |_Maria of TRASTÁMARA __+ | (1401 - 1458) _Alfonso II TRASTÁMARA _| | (1448 - 1495) | | | ________________________ | | | | |_Isabella of CLERMONT ____| | (1424 - 1465) | | |________________________ | | |--Isabella of TRASTÁMARA | (1470 - 1523) | ________________________ | | | __________________________| | | | | | |________________________ | | |_Ippolita Maria SFORZA __| (1446 - 1488) | | ________________________ | | |__________________________| | |________________________