| Walter fitz Otho (d. 1100) |
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| Gerald de Windsor (d. c. 1136) |
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| Maurice FitzGerald Lord of Lanstephan (1100–1176) | | David FitzGerald Bishop of St. Davids (d. 1176) |
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| Thomas Fitzmaurice (d. 1213) | | Gerald FitzMaurice 1st Lord of Offaly (1150–1204) |
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| John FitzGerald 1st Baron Desmond (d. 1261) | | | | | | Maurice FitzGerald 2nd Lord of Offaly (1194–1257) |
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| Maurice FitzGerald (d. 1261) | | | | | | Maurice FitzGerald 3rd Lord of Offaly (1238–c. 1286) | | Thomas FitzGerald (d. 1271) |
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| Thomas FitzGerald 2nd Baron Desmond (d. 1298) | | | | | | | | | | John FitzGerald 1st Earl of Kildare (d. 1316) |
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| Thomas FitzGerald 3rd Baron Desmond (1290–1309) | | Maurice FitzGerald 1st Earl of Desmond (d. 1356) | | | | | | Thomas FitzGerald 2nd Earl of Kildare (d. 1328) |
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| Maurice FitzGerald 2nd Earl of Desmond (1336–1358) | | Gerald FitzGerald 3rd Earl of Desmond (d. 1398) | | | | | | Richard FitzGerald 3rd Earl of Kildare (d. 1329) | | Maurice FitzGerald 4th Earl of Kildare (d. 1390) |
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| John FitzGerald 4th Earl of Desmond (d. 1400) | | James FitzGerald 6th Earl of Desmond (d. 1459) | | | | | | Gerald FitzGerald 5th Earl of Kildare (d. 1410) | | John FitzGerald 6th Earl of Kildare (d. 1427) |
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| Thomas FitzGerald 5th Earl of Desmond (c. 1386–1420) | | Thomas FitzGerald 7th Earl of Desmond (d. 1468) | | | | | | | | | | Thomas FitzGerald 7th Earl of Kildare (c. 1421–1477) |
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| James FitzGerald 8th Earl of Desmond (1459–1487) | | Maurice FitzGerald 9th Earl of Desmond (d. 1520) | | Thomas FitzGerald 11th Earl of Desmond (1454–1534) | | John FitzGerald 13th Earl of Desmond (d. 1536) | | Gerald Mór FitzGerald 8th Earl of Kildare (d. 1513) | | Thomas FitzGerald of Laccagh (d. 1487) |
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| James FitzGerald 10th Earl of Desmond (d. 1529) | | Maurice FitzGerald (d. 1529) | | | | | | James FitzGerald 14th Earl of Desmond (d. 1558) | | Gerald Óg FitzGerald 9th Earl of Kildare (1487–1534) |
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| James FitzGerald 12th Earl of Desmond (d. 1540) | | Maurice FitzGerald | | Thomas FitzGerald (d. 1595) | | Gerald FitzGerald 15th Earl of Desmond (d. 1583)[1] | | Thomas FitzGerald 10th Earl of Kildare (1513–1537)[2] | | Gerald FitzGerald 11th Earl of Kildare (1525–1585)[3] | | Edward Fitzgerald (b. 1528) |
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| James FitzMaurice FitzGerald (d. 1579) | | John FitzGerald Conde de Desmond (d. aft. 1615) | | James Fitzgerald 17th/16th Earl of Desmond (d. 1605) | | James FitzGerald 16th/1st Earl of Desmond (d. 1601)[4] | | Henry FitzGerald 12th Earl of Kildare (1562–1597) | | William FitzGerald 13th Earl of Kildare (d. 1599) | | | |
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| | | | | Gerald FitzGerald (d. 1632) | | | | | | | | | | | | | | Thomas Fitzgerald (d.1619) | | Gerald FitzGerald 14th Earl of Kildare (d. 1612) |
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| | | | | | | | | | | | | | | | | George FitzGerald 16th Earl of Kildare (1611–1660) | | | | | | Gerald FitzGerald 15th Earl of Kildare (1611–1620) |
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| | | | | | | | | | | | | Wentworth FitzGerald 17th Earl of Kildare (1634–1664) | | Robert FitzGerald (1637–1698) |
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| | | | | | | | | | | | | John FitzGerald 18th Earl of Kildare (1661–1707) | | Robert FitzGerald 19th Earl of Kildare (1675–1744) |
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| | | | | | | | | | | | | | | | | James FitzGerald 1st Duke of Leinster (1722–1773) |
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| George FitzGerald Earl of Offaly (1748–1765) | | William FitzGerald 2nd Duke of Leinster (1749–1804) | | Charles FitzGerald 1st Baron Lecale (1756–1810) | | Henry FitzGerald (1761–1829) | | Edward FitzGerald (1763–1798)[5] | | Robert FitzGerald (1765–1833) |
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| Augustus FitzGerald 3rd Duke of Leinster (1791–1874) | | | | | | | | | | Henry FitzGerald-de Ros 22nd Baron de Ros (1793–1839) | | William FitzGerald-de Ros 23rd Baron de Ros (1797–1874) |
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| Charles FitzGerald 4th Duke of Leinster (1819–1887) | | Otho FitzGerald (1827–1882) | | | | | | | | | | Dudley FitzGerald-de Ros 24th Baron de Ros (1827–1907) |
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| Gerald FitzGerald 5th Duke of Leinster (1851–1893) | | | | | | | | | | | | | | Mary FitzGerald-de Ros 25th Countess de Ros (1854–1939) |
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| Maurice FitzGerald 6th Duke of Leinster (1887–1922) | | Desmond FitzGerald (1888–1916) | | Edward FitzGerald 7th Duke of Leinster (1892–1976) |
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| | | | | | | | | Gerald FitzGerald 8th Duke of Leinster (1914–2004) |
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| | | | | | | | | Maurice FitzGerald 9th Duke of Leinster (b. 1948) | | John FitzGerald (b. 1952) |
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| | | | | | | | | Thomas FitzGerald Earl of Offaly (1974–1997) | | Edward FitzGerald (b. 1988) |