In the late fall of 1046 the rebellion focused on the assassination of the young Duke, himself and replacing him with Guy of Burgundy. A group of lords from the district of Singlis, situated between Caen and Falaise added their support. We find among this group Haimo dentatus (the teeth) the son of Maugar who was the son of Richard I. Haimo was the older brother of the Walderne/Walter, apparent ancestor to the St. Clair/Sinclair line to Scotland and England.