Lettau (surname)

Lettau is a surname of French origin. Along with numerous variants such as Létau, Letaux, Leteau, Letteau, Létaud, Letault, Leteault, and Letaut, it may stem from the Old Breton name for Armorica or Brittany, Letau (“land” or “earth”), itself derived from the name of the Gallic deity Litavis. Alternatively, it may derive from Mont Létaud in Auvergne or Litteau in Normandy.

People with the surname include:
 * Andre Lettau, German live midstakes poker player
 * Georg Lettau (1878–1951), German lichenologist
 * Heinz Lettau (1909–2005), professor of meteorology at the University of Wisconsin
 * Hippolyte Guérin de Litteau/Letteau (1797-1861), French poet
 * Kevyn Lettau (born 1959), American jazz vocalist
 * Reinhard Lettau (1929–1996), German-American writer and professor