Duke of Victoria (Portuguese: Duque da Vitória, lit.

The title was created by Prince Regent John of Portugal (later King John VI) on 18 December 1812 to honour the British General Arthur Wellesley, who commanded the armies that eventually defeated the troops of Emperor Napoleon I of France in the Peninsular War.

[citation needed] Arthur Wellesley had already received the Portuguese titles Conde de Vimeiro (Count of Vimeiro, 18 October 1811) and Marquês de Torres Vedras (Marquess of Torres Vedras, 17 December 1812), which became titles subsidiary to that of Duque da Vitória.

[citation needed] The heir apparent is the present holder's son Arthur Gerald Wellesley, whose heir apparent is his son Arthur Darcy Wellesley.

Notwithstanding, although the status of nobility has not been recognised in law since 1910, legitimate titles of nobility (those granted by a reigning monarch before 5 October 1910) have been given legal recognition and protection, including under article 26 of the Portuguese Constitution, in conjunction with articles 70 and 72 of the Civil Code, as established by decision of Portugal's Supreme Court of Justice in 2014.