Namesakes
Danish Prime Ministers:
1 prime minister
Klaus Berntsen 1910-1913 
Fictional Characters from Television:
1 character
Klaus Heisler 2005 American Dad!
Hurricanes and Tropical Storms:
2 hurricanes
Hurricane Klaus 1984
Hurricane Klaus 1990
Nobel Prize Winners:
2 physics
(physics) Klaus von Klitzing 1985
(physics) Klaus Hasselmann 2021
Notable Actors and Entertainers:
2 actors
Klaus Kinski 1926-1991
Klaus Maria Brandauer 1943-
Notable Athletes:
1 soccer
(soccer) Stefanos Athanasiadis (middle name Klaus) 1988-
Notable Musicians:
3 musicians, 1 composer, 1 singer
Klaus Nomi 1944-1983
Klaus Dinger 1946-2008
Klaus Röder 1948-
Klaus Meine 1948-
Klaus Badelt 1967-
Notable Politicians and Statespeople:
1 politician
Norbert Schmelzer (middle name Klaus) 1921-2008
Notable Scientists and Inventors:
1 physicist
Klaus von Klitzing 1943-
Olympic Medalists:
5 bronze, 5 silver, 1 gold, 1 gold/silver, 1 silver/bronze
(silver) Klaus Richtzenhain 1956 1500 m
(bronze) Klaus Lehnertz 1964 pole vault
(silver) Klaus Beer 1968 long jump
(gold/silver) Klaus Dibiasi 1964; 1968; 1972; 1976 diving - platform; diving - springboard
(silver) Klaus Katzur 1972 swimming - 4x100 m medley relay
(gold) Klaus Wolfermann 1972 javelin throw
(bronze) Klaus Ehl 1972 4x100 m relay
(bronze) Klaus Auhuber 1976 ice hockey
(bronze) Klaus-Peter Hildenbrand 1976 5000 m
(silver/bronze) Klaus Steinbach 1972; 1976 swimming - 4x200 m freestyle relay; swimming - 4x100 m medley relay
(silver) Klaus-Dieter Kurrat 1976 4x100 m relay
(silver) Klaus Thiele 1980 4x400 m relay
(bronze) Klaus Ploghaus 1984 hammer throw
Other Leaders:
1 prime minister
Prime Minister Klaus Tschütscher 2009-2013 Liechtenstein
Other Royalty:
1 prince consort
Claus of the Netherlands (a.k.a. Klaus) 1980-2002 Netherlands
Romanian Presidents and Prime Ministers:
1 president
(president) Klaus Iohannis 2014-