House of Blois chose a wife from the House of Champagne (Adela of Champagne) as a counterpoise to Angevin power. The senior line of the House of Blois became extinct with the death of Joan I of Navarre, wife of Philip IV of France, in 1305. Champagne and Navarre passed to the Capetian dynasty. King Stephen I of England, 1135–1154, was both a member of the House of Blois and the last Anglo-Norman King, being the grandson of William the Conqueror through his daughter Adela of Normandy. A branch of the family was established in Sancerre by Stephen I of Sancerre, a younger
Stephen, King of England lands previously held by William in England. The gift of the Honour of Lancaster also followed after it was confiscated by Henry from Roger the Poitevin. Stephen was also given lands in Alençon in southern Normandy by Henry, but the local Normans rebelled, seeking assistance from Fulk, the Count of Anjou. Stephen and his older brother Theobald were comprehensively beaten in the subsequent campaign, which culminated in the battle of Alençon, and the territories were not recovered. Finally, the King arranged for Stephen to marry Matilda in 1125, the daughter and only heiress of the Count of Boulogne, who owned