Nielsen Hayden genealogy
Family: William de Montagu / Katherine de Grandison (F11244)
m. Bef 1328-
Father | Male
William de Montagu
Born Between 1302 and 1303 of Shepton Montague, Somerset, England 
Died 30 Jan 1344 Buried Married Bef 1328 [1] Father William de Montagu | F4542 Group Sheet Mother Elizabeth de Montfort | F4542 Group Sheet
Mother | Female
Katherine de Grandison
Born Died 23 Apr 1349 Buried Father William de Grandison | F237 Group Sheet Mother Sibyl de Tregoz | F237 Group Sheet
Child 1 | Female
+ Philippe de Montagu
Born Died 5 Jan 1382 Buried Austin Priory, Bisham, Berkshire, England 
Spouse Roger de Mortimer | F11184 Married
Child 2 | Female
+ Sybil Montagu
Born Died Buried Spouse Edmund Fitz Alan | F13760 Married Bef 16 Jul 1347
Child 3 | Male
+ John de Montagu
Born Abt 1329 of Wark-upon-Tweed, Northumberland, England 
Died 25 Feb 1390 Buried Lady Chapel, Salisbury Cathedral, Wiltshire, England 
Spouse Margaret Monthermer | F10305 Married
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Sources - [S142] Royal Ancestry: A Study in Colonial and Medieval Families by Douglas Richardson. Salt Lake City, 2013.
- [S142] Royal Ancestry: A Study in Colonial and Medieval Families by Douglas Richardson. Salt Lake City, 2013.