Died 1065 Children Jean Ier de Dol | Parents Hamon Ier | |
Rivallon of Dol-Combourg was born to Hamo I, Viscount of Alet and Roianteline. RIvallon's eldest brother was Hamo II Viscount of Alet, while his next eldest brother Josselin became the seigneur of Diana. Another brother Jungeon became Archbishop of Dol, Rivallon also had a sister Imogen who was married to a knight of Alan III of Brittany a man she completely dominated becoming the eventual guardian of their son Brien. Hamo I also had a natural son Saloman who was the given the fief of Garclip later known as the seigneure of Du Guseclin.
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Rivallon married Aremburga du Puiset, the daughter of Evrard, Count of Bretueil He died around 1065.
Dol rebels against Conan II
Rivallon was influenced by William the Conqueror, the Duke of Normandy.
In this period Normandy and Brittany clashed with each other in border skirmishes. Before William had become Duke, the Breton tribal lands of the Contentin Peninsula, near Dol, had been ceded to Norman rule. When Duke Alan III of Brittany died he left Brittany to his infant son Conan II with his younger brother, Odo of Penthievre, as Conan's Regent. Odo challenged Conan II by refusing to relinquish rule on Conan's achieving his majority. Conan affirmed his rule as Duke only when he imprisoned Odo in 1057.
Following this, in 1065 William, as Duke of Normandy convinced Rivallon to rebel against Conan II, Duke of Brittany with the aid of Geoffrey III of Anjou. This rebellion was the first major conflict of the Breton-Norman War.
Family
Rivallon I and Aremburga du Puset had four children:
Rivallon died in 1065
Geoffroi, youngest son of Rivallon, took the surname of Gorron,Gorram. His son Ruellon de Gorram, married Hersende daughter of Walter de Mayenne.