Sibyl de Neufmarché he could rely to implement royal policy. Sibyl's father died sometime before 1128 (most probably in 1125), and Miles came into possession of her entire inheritance, which when merged with his own estates, formed one honour. Together Sibyl and Miles had eight children: After Henry I's death in 1135, the throne of England was seized by Stephen of Blois, a grandson of William I of England. Henry's daughter, Empress Matilda (Maud), also claimed the throne, and had the support of the Marcher Lords. On the death of her husband, the Holy Roman Emperor, Henry V, in 1125, Matilda had returned
Henry I of England now had the best claim to the throne. William of Breteuil championed the rights of Robert, who was still abroad, returning from the Crusade, and to whom Henry and the barons had given homage in previous years. Henry argued that, unlike Robert, he had been born to a reigning king and queen, thereby giving him a claim under the right of porphyrogeniture. Tempers flared, but Henry, supported by Henry de Beaumont and Robert of Meulan, held sway and persuaded the barons to follow him. He occupied Winchester Castle and seized the royal treasury. Henry was hastily crowned king in Westminster