Nicholas Mavrogenes (or Mavrogenous; Greek: Νικόλαος Μαυρογένης Nikolaos Mavrogenis (Greek: "Blackbeard"), Romanian: Nicolae Mavrogheni pronounced [nikoˈla.e mavroˈɡeni]), (1735 – 30 September 1790) was a Phanariote Dragoman of the Fleet and de facto governor of the Cyclades islands (1744-1759) and later Prince of Wallachia (reigned 1786–1789). He was the great-uncle of Manto Mavrogenous, a heroine of the Greek War of Independence.