Hasso-Eccard Freiherr von Manteuffel (14 January 1897 – 24 September 1978) was a German soldier and classical liberal politician of the 20th century. He served in both world wars, and during World War II was a distinguished general. He was a tank commander noted for his tactical skill and was one of only 27 holders of the Knight's Cross with Oak Leaves, Swords, and Diamonds.