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 in his own right to represent a threat to either the King or his heir, William Adelin. As a third surviving son, even of an influential regional family, Stephen still needed the support of a powerful patron such as the King to progress in life. With Henry's support, Stephen rapidly began to accumulate lands and possessions. Following the battle of Tinchebray in 1106, Henry confiscated the County of Mortain from William of Mortain, and the Honour of Eye, a large lordship previously owned by Robert Malet. In 1113, Stephen was granted both the title and the honour, although without the