Klaus is a German, Dutch and Scandinavian given name and surname. It originated as a short form of Nikolaus, a German form of the Greek given name Nicholas. Notable persons whose family name is Klaus. Billy Klaus (1928–2006), American baseball player. Chris Klaus (born 1973), American entrepreneur. Frank Klaus (1887–1948), German-American boxer, 1913 Middleweight Champion. Fred Klaus (born 1967), German footballer. Josef Klaus (1910–2001), Chancellor of Austria 1966–1970. Karl Ernst Claus (1796–1864), Russian chemist.
https://en.wikipedia.org/wiki/Klaus