|Geoffrey I of Rennes|
Rennes, County of Rennes, Duchy of Brittany
|Died||20 November 1008|
Nantes, Loire-Atlantique, Pays de la Loire, France
|Issue|| Alan III of Brittany |
Emme de Bretagne
Odo, Count of Penthièvre
Adela, Abbess of St. Georges
|House||House of Rennes|
|Mother||Ermengarde of Anjou|
Geoffrey I, Duke of Brittany (c. 980 – 20 November 1008), also known as Geoffrey of Rennes and Geoffrey Berengar, was the eldest son of Duke Conan I of Brittany. He was Count of Rennes (ruler of the Romano-Frankish civitas of Rennes), by right of succession. In 992 he assumed the title of Duke of Brittany, which had long been an independent state, but he had little control over much of Lower Brittany.
Geoffrey was the son of Duke Conan I, by his marriage to Ermengarde-Gerberga of Anjou.He was the grandson of Judicael Berengar, Count of Rennes.
When Geoffrey succeeded to Brittany he had several problems:
In 996, at about the age of sixteen, Geoffrey entered into a dynastic alliance with Richard II, Duke of Normandy,with a diplomatic double marriage between the two houses. The church-sanctioned marriage ceremonies were held at Mont Saint-Michel, on the Breton-Norman border, and while Geoffrey married Hawise of Normandy, daughter of Richard I of Normandy and sister of Richard II, Richard married Judith of Brittany, Geoffrey's sister.
Geoffrey and Hawise had four children:
Geoffrey died on 20 November 1008 while travelling on a pilgrimage to Rome.
Robert I, was the elected King of West Francia from 922 to 923. Before his election to the throne he was Count of Poitiers, Count of Paris and Marquis of Neustria and Orléans. He succeeded the overthrown Carolingian king Charles the Simple, who in 898 had succeeded Robert's brother, king Odo.
Otto-William was count of Mâcon, Nevers, and Burgundy.
Alan III of Rennes was Count of Rennes and duke of Brittany, by right of succession from 1008 to his death.
Richard I, also known as Richard the Fearless, was the count of Rouen from 942 to 996. Dudo of Saint-Quentin, whom Richard commissioned to write the "De moribus et actis primorum Normanniae ducum", called him a dux. However, this use of the word may have been in the context of Richard's renowned leadership in war, and not as a reference to a title of nobility. Richard either introduced feudalism into Normandy or he greatly expanded it. By the end of his reign, the most important Norman landholders held their lands in feudal tenure.
Geoffrey III of Anjou, called le Barbu, was the Count of Anjou 1060–68.
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Baldwin III, called the Young, was Count of Flanders, who briefly ruled the County of Flanders together with his father, Arnulf I, from 958 until his early death.
Conan I nicknamed Le Tort was the Duke of Brittany from 990 to his death.
Ermengarde of Anjou, known as Blanche, was a Duchess consort of Burgundy. She was the daughter of Count Fulk III of Anjou and Hildegarde of Sundgau. She was sometimes known as Ermengarde-Blanche.
Odo II was the count of Blois, Chartres, Châteaudun, Beauvais and Tours from 1004 and count of Troyes and Meaux from 1022. He twice tried to make himself a king: first in Italy after 1024 and then in Burgundy after 1032.
Theobald I (913–975), called the Trickster, was the first count of Blois, Chartres, and Châteaudun as well as count of Tours.
Adela of France, known also as Adela the Holy or Adela of Messines;, was, by marriage, the duchess of Normandy, and countess of Flanders (1035–1067).
Adelaide-Blanche of Anjou was, by her successive marriages, countess of Gévaudan and Forez, of Toulouse, of Provence, and of Burgundy, and queen of Aquitaine. She was the regent of Gevaudan during the minority of her sons in the 960s, and the regent of Provence during the minority of her stepson from 994 until 999.
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Hugh IV was Count of Maine from 1036 to 1051.
Judith of Brittany, also called Judith of Rennes (982–1017), was Duchess of Normandy from c. 1000 until her death.
Ermengarde of Anjou,, was the Countess of Rennes, Regent of Brittany (992–994) and also Countess of Angoulême.
Hawise of Normandy was Countess of Rennes, Duchess of Brittany and Regent to her son Alan III, Duke of Brittany from 1008 until 1026.