Family: John De Grey, 2nd Baron Grey de Rotherfield / Avice Marmion (F753)
m. Bef 27 Dec 1317
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 | John De Grey, 1st Baron Grey of Rotherfield  (1277-1311)
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 | Margaret Oddingseles (1277-1330)
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| John Marmion, 4th Baron Marmion Of Winteringham (1292-1335)
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| Elizabeth Maud De Furnival (1292-1361)
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| John De Grey, 2nd Baron Grey de Rotherfield (1300-1359)
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| Avice Marmion (1309-1387)
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| Robert de Grey (1343-1367)  |
| Maud Matilda Grey (1347-1394) |