A Germanic given name, famous from historical figures and modern fictional characters.
From the Germanic name 'Klaus,' a diminutive of 'Nikolaus' (Nicholas), which comes from Greek 'Nikolaos' (victory of the people, from 'nike' meaning victory and 'laos' meaning people). The name became popular in German-speaking countries. Modern English speakers know it mostly from fictional characters and German history.
Klaus is basically the German version of Nicholas, and it got super popular in the 1960s-70s from German TV and movies that spread worldwide—but most English speakers today know it from the villain Klaus from 'American Dad!'
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