Family
ClaimDetailEvidence
FatherDreux de Montagu (e1180-<1217) [S775:IX.75] [S925] [S3175]
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MotherAline Basset (e1191-) [S775:IX.75] [S925] [S3175]
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SpouseBerthe (e1214-) 
Child +Simon de Montagu, 1st Baron Montagu (>1250-1316) [S775:IX.75] [S925] [S2471] [S3175]
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Attributes
ClaimDetailEvidence
GenderMale
NameWilliam de Montagu [S3175]
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NameWilliam of Montagu [S775:IX.75] [S925]
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FatherDreux de Montagu (e1180-<1217) [S775:IX.75] [S925] [S3175]
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MotherAline Basset (e1191-) [S775:IX.75] [S925] [S3175]
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GrandfatherWilliam de Montagu (e1139->1217) [S775:IX.75]
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Timeline
ClaimDateDetailAgeEvidence
Birthabt 1213England [S925] [S3175]
Source: Cokayne says he was 21 in a document dated after 1226
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Living1232/33 [S775:IX.75]
he was amerced for not taking knighthood
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Flourished1234 [S775:IX.75]
he was heir and obtained possession of his lands
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Flourished1236 [S775:IX.75]
he confirmed his grandfather's gift of the advowson of Shipton church to Bruton
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FlourishedJul 1244 [S775:IX.75]
he made a grant to Christchurch Hants
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Flourished1247 [S775:IX.75]
he was pardoned a forest trespass in Somerset
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Flourished1255 [S775:IX.75]
he was serving with Prince Edward in Wales
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Miltary 1257 to 1264 [S775:IX.75]
he was summoned for service in Wales
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Flourishedbef 1259 [S775:IX.75]
knighted
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Flourished1259 [S775:IX.75]
made an agreement with his Philip Basset and Ela, Countess of Warwick respecting Thurlbear and other manors
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Flourished1269 [S775:IX.75]
made an agreement with his Philip Basset and Ela, Countess of Warwick respecting Thurlbear and other manors
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DeathSep 23, 1270 [S775:IX.75] [S925] [S3175]
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Sources
IndexTitle
[S775] George Cokayne, "Complete Peerage" (https://dcms.lds.org/delivery/DeliveryManagerServlet?dps_pid=IE83409).
[S925] Cawley, Charles, "Foundation of Medieval Genealogy (Medieval Lands - England Earls 1138-1143)" (2006-7 (v.1.1 Updated 26 Jun 2006 )).
[S3175] Cawley, Charles, "Foundation of Medieval Genealogy (Medieval Lands - English Lords, L-O)" (https://fmg.ac/Projects/MedLands/ENGLISHNOBILITYMEDIEVAL3L-O.htm).