Klaas is a Dutch male given and surname. It is the Dutch short form of Nicholas, a Greek name ultimately meaning victory of the people. Its female variants is Klaas(s)ien(a). As a surname is mainly exists as Klaasen, and Klaas, both meaning "Son of Klaas".
Klaas Bolt (1927–1990), Dutch organist and improviser
Klaas Bom (born 1937), Dutch engineer
Klaas van den Broek (born 1955), Dutch ice hockey player
Klaas Bruinsma (translator) (born 1931), Dutch translator
Klaas Bruinsma (drug lord) (1953–1991), Dutch drug baron
Klaas Heufer-Umlauf (born 1983), German television host
Klaas-Jan Huntelaar (born 1983), Dutch footballer
Klaas-Jan van Noortwijk (born 1970), Dutch cricketer
Klaas Reimer (1770–1837), Prussian mennonite
Klaas Schilder (1890–1952), Dutch theologian and professor
Klaas Veenhof (born c. 1936), Dutch Assyriologist
Klaas Veering (born 1981), Dutch field hockey goalkeeper
Klaas de Vries (composer) (born 1944), Dutch composer
Klaas de Vries (politician) (born 1943), Dutch politician
Klaas-Erik Zwering (born 1981), Dutch swimmer and an Olympic medalist
Klaas (DJ), Dutch-born German electro house producer
C. J. Klaas (born 1983), American soccer defensive midfielder
Kathrin Klaas (born 1984), German hammer thrower
Polly Klaas (1981–1993), American murder victim
Jan Klaasen, the Dutch version of Punch and Judy
Klaas Wikipedia (Text) CC BY-SA