Nuno Álvares Pereira de Melo, 1st Duke of Cadaval, 4th Marquis of Ferreira, 5th Count of Tentúgal (4 November 1638 – 29 January 1725), was a Portuguese nobleman and statesman.

Nuno was a general in the Portuguese Restoration War, which earned him prestige and achieved himself the title of Duke of Cadaval.

In June 1670, Nuno became a member of the Ultramarine Council [pt], an administrative organ of the Portuguese Empire.

[1] His second wife was Princess Marie Angélique of Lorraine-Harcourt, daughter of François Louis, Count of Harcourt.

His third marriage was to Princess Marguerite of Lorraine-Armagnac (17 November 1662 – 16 December 1730), daughter of Louis, Count of Armagnac.