Mold Castle was erected under instructions from the Earl also known by what name?
Hugh d'Avranches, Earl of Chester Hugh d'Avranches (  1047  – 27 July 1101), also known as Hugh the Fat (French: "Hugues le Gros" ) or Hugh the Wolf (Latin: "Hugo Lupus" ), was the second Norman earl of Chester (2nd creation) and one of the great magnates of early Norman England.
Roger de Montgomerie, 1st Earl of Shrewsbury Roger de Montgomerie (died 1094), also known as Roger the Great de Montgomery, was the first Earl of Shrewsbury, and Earl of Arundel, Sussex. His father was Roger de Montgomery, seigneur of Montgomery, and was a relative, probably a grandnephew, of the Duchess Gunnor, wife of Duke Richard I of Normandy. The elder Roger had large holdings in central Normandy, chiefly in the valley of the Dives, which the younger Roger inherited.