House of Normandy
The House of Normandy ( ) designates the noble family which originates from the Duchy of Normandy and whose members were counts of Rouen, dukes of Normandy, as well as kings of England following the Norman conquest of England. It lasted until the House of Plantagenet came to power in 1154. The house emerged from the union between the Viking Rollo (first ruler of Normandy) and Poppa of Bayeux, a West Frankish noblewoman. William the Conqueror and his heirs down through 1135 were members of this dynasty. After that it was disputed between William's grandchildren, Matilda, whose husband  Geoffrey was the founder of the House of Plantagenet, and Stephen of the House of Blois (or Blesevin dynasty). The Norman counts of Rouen were: The Norman dukes of Normandy were: The Norman monarchs of England and Normandy were: Norman Count of Flanders: Family tree. "Counts of Rouen and Dukes of Normandy shown in bold."