in 1889, the 6th earl fife was further created duke of fife, in scotland, and marquess of macduff, in the county of banff, in the peerage of the united kingdom, two days after his marriage to princess louise of wales, the eldest daughter of albert edward, prince of wales (the future king edward vii). when it became clear that he would have no sons, he was further created duke of fife and earl of macduff, in the county of banff, also in the peerage of the united kingdom, with a special remainder to his daughters and their heirs male.