Duke of Santa Cruz was a title of nobility of the Empire of Brazil created by Emperor Pedro I of Brazil, dated from 5 November 1829, for his brother-in-law, Prince Auguste de Beauharnais, brother of Pedro's second wife Empress Amélie.

Coat of Arms of Auguste de Beauharnais, Duke of Santa Cruz.

Five years later, in December 1834, Auguste became (the late) Pedro I's son-in-law, when he was chosen to marry the Emperor's eldest daughter, Queen Maria II of Portugal.

The toponym associated to this title concerns Santa Cruz, today a neighborhood in Rio de Janeiro.

List of dukes

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References

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  • Information on the Dukedom of Santa Cruz – Geneall.net;
  • Marek, Miroslav. "Genealogy of the Beauharnais family - Euweb.cz". Genealogy EU.