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.
Earl of Mar The title Mormaer or Earl of Mar has been created several times, all in the Peerage of Scotland. The first and seventh creations are currently extant, and held by different individuals. The first creation of the earldom was originally the provincial ruler of the province of Mar in north-eastern Scotland. First attested in the year 1014, the "seat" or "caput" eventually became Kildrummy Castle, although other sites like Doune of Invernochty were initially just as important.