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 | 4th Baron Willoughby de Eresby Robert Willoughby (1350-1396)
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 | Margery la Zouche (1352-1391)
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| Sir Thomas Willoughby ( -1417)  |
| 5th Lord Strange of Knockin Roger Le Strange (1327-1382)
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| Aline Fitzalan (1314-1386)
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| 6th Baron John Le Strange (1352-1397) |
| Lucy Le Strange (1352-1406)
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| Elizabeth Willoughby (1386- ) |
| Sir Thomas Willoughby (1387-1432) |
| Margery Willoughby (1390-1452) |
