Nielsen Hayden genealogy
Family: John de Montagu / Margaret Monthermer (F10305)
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Father | Male
John de Montagu
Born Abt 1329 of Wark-upon-Tweed, Northumberland, England 
Died 25 Feb 1390 Buried Lady Chapel, Salisbury Cathedral, Wiltshire, England Married Father William de Montagu | F11244 Group Sheet Mother Katherine de Grandison | F11244 Group Sheet
Mother | Female
Margaret Monthermer
Born 1329 Died 24 Mar 1395 Buried Selwood Priory, Wiltshire, England Father Thomas de Monthermer | F10306 Group Sheet Mother Margaret de Brewes | F10306 Group Sheet
Child 1 | Male
+ John Montagu
Born Abt 1351 of Wark-upon-Tweed, Northumberland, England Died 7 Jan 1400 Cirencester, Gloucestershire, England Buried Spouse Maud Fraunceys | F11488 Married Bef 4 May 1383
Child 2 | Female
+ Eleanor Montagu
Born Abt 1364 Died Between 1393 and 1394 Buried St. Mary's, Kingskerswell, Devon, England Spouse John Dinham | F10294 Married Bef 3 Feb 1380