Geoffroi Duc de Bretagne
- Born: Abt 980, Rennes, Anjou, France 160
- Marriage: Hawise de Normandy in 996-999 160
- Died: 20 Nov 1008, his return from a pilgrimage to Rome about age 28 160,709
 Other names for Geoffroy were Geoffrey-Berengar and Geoffroy Duke of Brittany.
General Notes:
~Weis' Ancestral Roots . . ., 119A:22, 214:22, Duke of Brittany, married Hawise of Normandy, the illegimate daughter of Richard I, Duke of Normandy. They were the parents of Eudes I, Co-Regeant of Brittany and Count of Penthievre. 160
Information about this person:
• Background Information. 141
Geoffrey, duke of Brittany, married Hawise, daughter of Richard I, Duke of Normandy, and died in 1008, leaving two sons, Alan and Eudon. During their mother's lifetime the two brothers seem to have been joint rulers of Brittany, but on her death, on 21 February 1034, dissensions broke out between them; peace was restored by a settlement under which Eudon received a territory corresponding roughly to the dioceses of Dol, St. Mialo, St. Brieuc and Tréguier, reduced in the hands of his successors to the two last-named dioceses, while Alan retained the rest of Brittany. After the death of Alan in 1040 Eudon seized the government of Brittany to the exclusion of his nephew Conan, who recovered it in 1057. Eudon died 7 January 1079. He married Orguen, whose parentage is unknown.
~ Cokayne's Complete Peerage, 2nd Edition, (Richmond) Vol. X, pp. 779-781
• Death. 160,709
He died at the age of 28 while on a pilgrimage to Rome.
Geoffroi married Hawise de Normandy, daughter of Richard I "the Fearless" de Normandy Princeps Nortmannorum and Gunnor, in 996-999.160 (Hawise de Normandy was born about 976 and died on 21 Feb 1034.)
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