• English Princess
  • Duchess Consort of Brittany
Constance of Normandy was born circa 1066 to William I of England (1027-1087) and Matilda of Flanders (c1031-1083) and died circa 1090 of poisoning. She married Alain Fergent de Bretagne (c1060-1119) 1087 JL . Notable ancestors include William I of England (1027-1087), Charlemagne (747-814), Hugh Capet (c940-996), Alfred the Great (849-899). Ancestors are from France, Germany, the Netherlands, Belgium, the United Kingdom.

Constance of Normandy was a daughter of William the Conqueror and Matilda of Flanders. She was a Princess of England by birth and also Duchess of Brittany through her marriage to Alan IV, Duke of Brittany.

It was said she was the most highly gifted of all of the Conqueror's daughters. As she was the favourite of her mother, she was offered later in marriage, in 1086, to Alan IV of Brittany, and the two were married at Caen, Normandy. Constance died childless, perhaps poisoned, on 13 August 1090, and was buried in the Church of Église Saint-Melaine, in Rennes.

In 1672, her tomb was discovered and opened. Inside were some fragments of a woollen material which at the time the body had been wrapped in and a leaden cross with her epitaph engraved with the name of her father, husband, and date of death.


Offspring of William I of England and Matilda of Flanders (c1031-1083)
Name Birth Death Joined with
Robert III, Duke of Normandy (c1051-1134) 1051 (Normandy) 10 February 1134 (Cardiff Castle+ Glamorganshire+ Wales) Sybilla of Conversano (-1103)

Richard of Normandy (c1054-1081) 1054 Normandy 1081 New Forest, Hampshire
Adeliza of Normandy (c1055-1065) 1055 Normandy 1065
Cecilia of Normandy (c1055-1126) 1055 Normandy, France 30 July 1126 Caen, Calvados, France
William II of England (c1056-1100) 1056 Normandy, France 2 August 1100 New Forest, England, United Kingdom
Adela of Normandy (c1062-1138) 1062 Normandy, France 8 March 1138 Marcigny, Saône-et-Loire, France Stephen II, Count of Blois (c1045-1102)

Agatha of Normandy (c1064-c1079) 1064 1079
Constance of Normandy (c1066-1090) 1066 1090 Alain Fergent de Bretagne (c1060-1119)

Henry I of England (1068-1135) 13 June 1068 Selby, Yorkshire, England, United Kingdom 1 December 1135 St. Denis-le-Fermont near Gisors, Picardy, Lyons-la-Forêt, Eure, France Ansfrid (1070-?)
Matilda of Scotland (c1080-1118)
Sybil Corbet (1077-?)
Gieva de Tracy
Nest ferch Rhys (c1073-aft1136)
Isabel de Beaumont
Adeliza of Leuven (1103-1151)

Matilda of Normandy (c1061-1086) 1061 Normandy, France 1086 France


Footnotes (including sources)


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