| 2896 | Duke | William FitzGerald, 2nd Duke of LeinsterDuke | FitzGerald (House of) | 🇮🇪IE | | James FitzGerald, 1st Duke of Leinster | 9 ch.Children (no sourced line of succession) | d. 1804 |
| 2902 | Duke | Lord Henry FitzGeraldDuke | FitzGerald (House of) | 🇮🇪IE | | James FitzGerald, 1st Duke of Leinster | 8 ch.Children (no sourced line of succession) | d. 1829 |
| 2914 | Duke | Augustus FitzGerald, 3rd Duke of LeinsterDuke | FitzGerald (House of) | — | | William FitzGerald, 2nd Duke of Leinster | 4 ch.Children (no sourced line of succession) | d. 1874 |
| 2923 | Duke | Charles FitzGerald, 4th Duke of LeinsterDuke | FitzGerald (House of) | — | | Augustus FitzGerald, 3rd Duke of Leinster | 15 ch.Children (no sourced line of succession) | d. 1887 |
| 2941 | Duke | Gerald FitzGerald, 5th Duke of LeinsterDuke | FitzGerald (House of) | — | | Charles FitzGerald, 4th Duke of Leinster | 4 ch.Children (no sourced line of succession) | d. 1893 |
| 2953 | Duke | Maurice FitzGerald, 6th Duke of LeinsterDuke | FitzGerald (House of) | — | | Gerald FitzGerald, 5th Duke of Leinster | 0 ch. | d. 1922 |
| 2954 | Duke | Edward FitzGerald, 7th Duke of LeinsterDuke | FitzGerald (House of) | 🇬🇧GB+1 | | Gerald FitzGerald, 5th Duke of Leinster | 2 ch.Children (no sourced line of succession) | d. 1976 |
| 2966 | Duke | Gerald FitzGerald, 8th Duke of LeinsterDuke | FitzGerald (House of) | 🇬🇧GB | | Edward FitzGerald, 7th Duke of Leinster | 5 ch.Children (no sourced line of succession) | d. 2004 |
| 2977 | Duke | Maurice FitzGerald, 9th Duke of LeinsterDuke | FitzGerald (House of) | 🇬🇧GB | 21 y 343 d | Gerald FitzGerald, 8th Duke of Leinster | 3 ch.Children (no sourced line of succession) | 78 |
| 3913 | Princess | Nest ferch RhysPrincess | FitzGerald (House of) | — | | unknown | 7 ch.Children (no sourced line of succession) | d. 1136 |
| 5488 | Countess | Lady Joan FitzgeraldCountess | FitzGerald (House of) | — | | James FitzGerald, 10th Earl of Desmond | 7 ch.Children (no sourced line of succession) | d. 1565 |
| 5508 | Count | Gerald FitzGerald, 11th Earl of KildareCount | FitzGerald (House of) | — | | Gerald FitzGerald, 9th Earl of Kildare | 5 ch.Children (no sourced line of succession) | d. 1585 |
| 5532 | Count | Henry FitzGerald, 12th Earl of KildareCount | FitzGerald (House of) | — | | Gerald FitzGerald, 11th Earl of Kildare | 3 ch.Children (no sourced line of succession) | d. 1597 |
| 5533 | Count | William FitzGerald, 13th Earl of KildareCount | FitzGerald (House of) | — | | Gerald FitzGerald, 11th Earl of Kildare | 0 ch. | d. 1599 |
| 9224 | unknown | Gerald de Windsor | FitzGerald (House of) | — | | unknown | 4 ch.Children (no sourced line of succession) | d. 1136 |