Gilbert Montgomerie
1020 - 1063 (43 years)-
Name Gilbert Montgomerie [1, 2, 3] Birth 1020 Saint-Germain-de-Montgommery, Calvados, Normandy, France 
Gender Male Death 1063 Shrewsbury, Shropshire, England [1, 2] Cause: Poisoned by Mabel Person ID I10293 Clan Montgomery Society Last Modified 14 Oct 2026
Father 5th Count Montgomery Roger I Montgomerie, b. 985, Saint-Germain-de-Montgommery, Calvados, Normandy, France d. 1040, Paris, Île-de-France, France (Age 55 years) Relationship natural Mother Josceline de Pontaudemer Harcourt, b. 989, Pont-Audemer, Eure, Haute-Normandie, France d. 7 Feb 1050, Pont-Audemer, Eure, Haute-Normandie, France (Age 61 years) Relationship natural Marriage 1010 France Family ID F3296 Group Sheet | Family Chart
Family Children + 1. Radulfus Montgomery, I [Father: natural] 2. Gilbert Montgomerie [Father: natural] > 3. Aimeria Montgomerie [Father: natural] Family ID F24011 Group Sheet | Family Chart Last Modified 14 Oct 2026
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Event Map 
Birth - 1020 - Saint-Germain-de-Montgommery, Calvados, Normandy, France 
Death - Cause: Poisoned by Mabel - 1063 - Shrewsbury, Shropshire, England = Link to Google Earth Pin Legend 
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Notes - REF: Ordericus Vitalis, II, 81, 106-7.
Gilbert was poisoned in 1063 by Mabile de Belleme.
- REF: Ordericus Vitalis, II, 81, 106-7.
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Sources - [S3152] Montgomery, Bo-Gabriel de, Origin and History of the Montgomerys, (Name: William Blackwood and Sons, Ltd; Location: Edinburgh and London; Date: 1948;), This book is available electronically on ancestry.com.
- [S3147] Montgomery, Thomas Harrison, Genealogical History of the Family of Montgomery, (Name: Printed for Private Circulation; Location: Philadelphia; Date: 1868;), Pages 009-013; I - VEarliest MontgomerysElectronic Book .PDF 170 pagesa_genealogical_history_of_the_family_of_.pdf.
- [S3436] De Boever, Luc, The Montgommerys from the Vikings to our Present Day, (Name: l'Imprimerie Moderne de Bayeux; Location: Bayeux, France; Date: 2018;), Part 2, Section 8Pages 35-40Roger II Montgomerie.
- [S3152] Montgomery, Bo-Gabriel de, Origin and History of the Montgomerys, (Name: William Blackwood and Sons, Ltd; Location: Edinburgh and London; Date: 1948;), This book is available electronically on ancestry.com.
