Arms:Quarterly: 1st, Or a Lion rampant Gules armed and langued Azure (Dukedom of Fife); 2nd, the arms of the United Kingdom as borne by HM King Edward VII differenced by a Label of five points Argent the points charged with two Thistles between three Crosses of St George Gules (HRH The Princess Royal, Duchess of Fife); 3rd, grandquarterly: 1st and 4th, Vert a Fess dancetty Ermine between a Hart's Head cabossed in chief and two Escallops in base Or (Duff of Braco); 2nd and 3rd, Gules three Skeans paleways Argent hafted and pommelled Or surmounted by as many Wolves' Heads couped of the third (Skene of that Ilk); 4th, Gules a Banner displayed Argent charged with a Canton Azure a Saltire of the second (Bannerman of Elsick); over all ensigned of an Earl's Coronet proper an Inescutcheon Argent an Eagle displayed Azure armed beaked and membered Gules on its breast an Antique Covered Cup Or (Carnegie) Crests:Centre: a Thunderbolt proper winged Or (Carnegie); Dexter: a Knight denoting the ancient MacDuff armed at all points on a Horse in full speed in his dexter hand a Sword erect all proper his Jupon Argent on his sinister arm a Shield Or charged with a Lion rampant Gules the visor of his helmet shut over which on a Wreath of his liveries with a long Mantling flowing therefrom behind him and ending in a Tassel of the fourth doubling of the third is set a Lion rampant issuing out of a Wreath of the third and fourth the Caparisons of the horse Gules fimbriated Or and thereon six Shields of the last each charged with a Lion rampant of the fourth (Dukedom of Fife); Sinister: a Man in armour issuing from the loins and wearing a Tabard emblazoned of the arms Argent on a Fess between three Boars' Heads erased Gules three Mascles Or sustaining with his dexter hand a Banner developed Argent having a Canton Azure charged with a Saltire of the first (Ethel, Countess of Southesk) Supporters:Dexter: a Lion rampant guardant Gules langued Azure collared with a Label of five points Argent the points charged with two Thistles between three Crosses of St George Gules; Sinister: a Talbot Argent collared Gules the Collar charged with a Label of three points Argent
その後、アレグザンダーは1889年にルイーズ王女とバッキンガム宮殿で結婚式を挙げ、ヴィクトリア女王は彼を連合王国貴族爵位のファイフ公爵(Duke of Fife)およびマクダフ侯爵(Marquess of Macduff)に叙した[1][4]。このときの勅許状では、爵位は初代公の『直系男子(heirs male of his body)』に相続されると定められていたが、アレグザンダーとルイーズの間には夭逝した長男アラステア以後男子が生まれなかった。そこで1900年に女王は、「初代公の女子、およびその直系男子」にも相続を認めるという特別継承権(英語版)を備えたファイフ公爵及びマクダフ伯爵(Earl of Macduff)に叙した[1][5]。