| Johann II. von Aragon was son of Peter III. von Aragon and Constanze von Hohenstaufen, daughter of Manfred von Hohenstaufen and Beatrix von Savoy. |
| Beatrix von Savoy was daughter of Amadeus IV. von Savoy. |
| Peter IV. von Aragon was married to Leonora, daughter of Peter II. von Sizilien and Elisabeth von Kaernten. See Otto II. von Kaernten. |
| His daughter also, Leonora, married Johann I. von Castil, followed by: |
| Ferdinand I. von Aragon |
| Alphonse V. von Aragon and his son: |
| Ferdinand I. von Neapel |
| Leonora von Neapel married Ercole I. von Este, followed by: |
| Alphonse I. von Este |
| Ercole II.von Este married to Renee von Milan, daughter of Ludwig XII., Koenig von Frankreich. |
| Renee's daughter, Anna von Este, married Jacob I. von Nemours Savoy. |