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