Geoffrey, I Duke of Brittany
Abt 980 - 1008 (~ 28 years)-
Name Geoffrey , I Duke of Brittany [1, 2] Suffix I Duke of Brittany Born Abt 980 [1, 3] Gender Male Died 20 Nov 1008 [3, 4] Notes - He was also known as Geoffrey I. He gained the title of Duc de Bretagne in 992.
Geoffrey I of Rennes (980 - November 20, 1008) was the self-styled duke of Brittany, from 992 to his death.
Life
Geoffrey was the oldest son of Duke Conan I and Ermengarde-Gerberga of Anjou.
When Geoffrey succeeded to Brittany he had several problems; Blois was encroaching on his territory, Vikings were threatening his shores and Anjou was offering protection. He chose to align himself with the Duke of Normandy, marrying Hawise of Normandy, daughter of Richard I of Normandy in 996.
Geoffrey died en route while on a pilgrimage to Rome 20 November 1008.
Family
Geoffrey and Hawise had four children:
Alan III of Brittany (997-1040).
Evenus (c. 998 - aft. 1037).
Odo, Count of Penthièvre (d. 1079).
Adela, Abbess of St. Georges.
Person ID I4145 Bosdet Genealogy Last Modified 16 May 2013
Father Conan I of Rennes, b. 927, d. 27 Jun 992 (Age 65 years) Relationship Natural Mother Ermengarde-Gerberga of Anjou, b. 952, d. 992 (Age 40 years) Relationship Natural Married 973 [1, 5, 6] Family ID F67 Group Sheet
Family Hawise of Normandy, d. 21 Feb 1033/34 Married 996 Normandy, France 
[1, 7] Children 1. Odo, Count of Penthièvre, b. 999, d. 1079 (Age 80 years) Family ID F1181 Group Sheet
- He was also known as Geoffrey I. He gained the title of Duc de Bretagne in 992.
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- [S178] thePeerage.com, Darryl Lundy, (Location: Ngaio, Wellington, New Zealand;).
- [S182] The Complete Peerage or a History of the House of Lords and All its Members From the Earliest Times, Peter W. Hammond, editor, (Name: Sutton Publishing; Location: Stroud, Gloucestershire, U.K.; Date: 1998;), Pg779.
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- [S188] Royal Genealogies Website (ROYAL92.GED).
- [S371] Europäische Stammtafeln: Stammtafeln zur Geschichte der Europäischen Staaten, Detlev Schwennicke, (Name: Verlag von J. A. Stargardt; Location: Marburg, Germany; Date: 1984;).