William I De Montagu(abt 1275 - 18 OCT 1319/1320)Sir William De Grandison(abt 1255 - 27 Jun 1355)
Elizabeth De Montfort( - 1354)Sybil Tregoz(1271 - 12 Oct 1334)
m. 1327, Cassington, Oxfordshire, England
b. BET 1302 AND 1303, Cassington, Oxfordshire, England
d. 30 JAN 1343/1344, Windsor Castle, Berkshire, England, age: 41
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ud. Bisham, Berkshire, England
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b. abt 1304, Ashford, Hertfordshire, England
d. 23 Nov 1349, Bisham, Bershire, England, age: 45
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Children
> Elizabeth (Montacute) De Montagu(aft 1327 - 31 May 1359)
William De Montagu , Earl of Salisbury(25 Jun 1328 - 3 Jun 1397)