| | Robert Harcourt 1410–1470 | | |
Richard Harcourt 1416–1486 Edith Elizabeth St. Claire …–… | | |
William Harcourt 1420–1494 | | |
| | Thomas de Harcourt 1377–1420 | | |
John de Harcourt 1371–1406 | | |
Richard de Harcourt 1379–1431 | | |
Robert de Harcourt 1382–… | | |
Catherine de Harcourt 1383–… | | |
Isabel de Harcourt 1385–… | | |
| | Thomas de Harcourt 1343–1417 | | |
Richard Harcourt 1328–1349 Catherine Jaon Skareshull …–… | | |
| | William Harcourt 1300–1349 | | |
| | Ellen Eleanor la Zouche 1273–… | | | | Eudo Eon la Zouche 1244–1279 Millicent (Cantilupe) Cauntelo 1250–1298 | | | | Alan de la Zouche 1203–1270 Helen de Quincy 1222–1296 | | | | Roger de Quincy 1204–1264 Helen de Galloway 1208–1245 |
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| | | William Cantilupe 1216–1254 | | | | William Cantilupe 1185–1240 | | | | William Cantilupe 1159–1239 | | |
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| | | | | | | William Marshall 1143–1219 Isabel de Clare 1171–1220 | | |
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