Klein (surname)
Klein is the Dutch and German word for "small", which came to be used as a family name, and thence passed into the names of places, concepts and discoveries associated with bearers of this surname. It's also a common Jewish surname in the United States.
Politics and government
Clayton Klein (born 1949), American politician in Oregon
Ezra Klein (born 1984), U.S. political writer
Herbert Klein (born 1930), American politician
Herbert G. Klein (1918–2009), American political aide
Jacob Theodor Klein ("Plinius Gedanensium") (1685–1759), Prussian jurist, historian, botanist, mathematician and diplomat in service of Polish King August II the Strong
Joe Klein (born 1946), American writer for Time magazine
Louis Klein (Dominique Louis Antoine Klein) (1759–1845), General of the French Revolutionary Wars and Napoleonic Wars, French politician, French Peer
Norbert Klein (born 1956), Dutch politician
Ralph Klein (1942–2013), Canadian politician
Music and acting
Alan Klein (born 1940), English singer and songwriter (New Vaudeville Band)