The Sinclairs descend from Tognvald "the Mighty", Earl of Moere in Norway and of the Orkneys. In 876 his son Hrolf "the Ganger" entered the River Seine and pillaged the countryside. King Charles "the Simple" of France made peace by granting him the Province of Normandy, and the overloardship of Brittany. The treaty was signed at Castle Saint-Clair-Sur-Epte... William The Conqueror was a first cousin of the St Clairs. Nine Sinclair knights fought with...