Family: John De Grey, [Baron Grey] / Avice Marmion (F11351)
m. Abt 1342
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![John De Grey, [Sir]](img/male.jpg){kind=small} | John De Grey, [Sir] (1271-1311)
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 | Margaret Ole Oddingeseles (1274- )
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| John Marmion, [Baron Marmion] (1292-1335)
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| Maud Furnivalle (1313- ) |
| Joan Marmon (1313-1361)  |
| John De Grey, [Baron Grey] (1300-1359)
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| Avice Marmion (1309-1378)
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| John (De Grey) Marmion, [Baron Marmion] (1343-1368) |
| Robert Grey, [Sir Knight] (1345-1367) |