Family: 1st Baron St John of Basing John Saint John / Isabell De Courtenay (F1491)
m. Abt 1307
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 | Lord St. John John St. John (1235-1302)
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 | Alice Fitzpiers (1234-1305)
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| Hugh De Courtenay, I (1251-1292)
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| Eleanor Le Despencer (1259-1328)
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| 1st Baron St John of Basing John Saint John (1273-1329)
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| Isabell De Courtenay (1283-1325)
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| Margaret De St. John (1304-1361)  |