Geoffrey I, Duke of Brittany

E931688

Geoffrey I, Duke of Brittany was a late 10th- and early 11th-century Breton ruler known for consolidating ducal authority in Brittany and navigating complex alliances with the French crown and neighboring powers.

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Statements (46)

Predicate Object
instanceOf Duke of Brittany
human
medieval ruler
ally Richard II, Duke of Normandy NERFINISHED
burialPlace Mont Saint-Michel NERFINISHED
centuryOfActivity 10th century
11th century
child Adelaide of Brittany NERFINISHED
Alan III, Duke of Brittany NERFINISHED
Odo, Count of Penthièvre NERFINISHED
conflict Counts of Blois NERFINISHED
countryOfCitizenship Duchy of Brittany NERFINISHED
dateOfBirth circa 980
dateOfDeath 20 November 1008
deathCause illness (reported)
era High Middle Ages
ethnicGroup Breton
father Conan I, Duke of Brittany NERFINISHED
fatherInLaw Richard I, Duke of Normandy NERFINISHED
feudalAllegiance Kingdom of France NERFINISHED
givenName Geoffrey NERFINISHED
languageSpoken Breton
Latin
memberOf House of Rennes NERFINISHED
mother Ermengarde-Gerberga of Anjou NERFINISHED
motherInLaw Gunnor, Duchess of Normandy NERFINISHED
nobleFamily House of Rennes NERFINISHED
nobleTitle Duke of Brittany NERFINISHED
notableFor alliances with the Duchy of Normandy
consolidation of ducal authority in Brittany
relations with the French crown
occupation duke
placeOfDeath Nantes NERFINISHED
positionHeld Duke of Brittany NERFINISHED
predecessor Conan I, Duke of Brittany NERFINISHED
regionRuled Brittany NERFINISHED
reignEnd 1008
reignStart 992
religion Roman Catholicism
surface form: Catholicism
sexOrGender male
sibling Judith of Brittany NERFINISHED
spouse Hawise of Normandy NERFINISHED
successor Alan III, Duke of Brittany NERFINISHED
territory Brittany NERFINISHED
titleHeldFrom Duke of Brittany, from 992
titleHeldUntil Duke of Brittany, until 1008

Referenced by (1)

Full triples — surface form annotated when it differs from this entity's canonical label.

House of Rennes hasMember Geoffrey I, Duke of Brittany