Sir Arnold de Normanby

Sir Arnold de Normanby was a regent of Sodor during the Middle Ages. After a rebellion by the Sudrians in 1404, King Henry IV gave possession of Sodor to the Stanley family, while the previous rulers, the Percys, were sacked under the leadership of de Normanby with help from Henry IV's army, led by Sir Peter de Rigby, whom de Normanby took a liking to, as did he.

At some stage, de Normanby gave up his regency, but Henry IV wisely returned power to de Normanby and the Abbot of Cronk, also making de Normanby the first Duke of Sodor.