Klein in WordNet English dictionary

1. United States fashion designer noted for understated fashions (born in 1942)
   Klein  Calvin Klein  Calvin Richard Klein 
   
2. German mathematician who created the Klein bottle (1849-1925)
   Klein  Felix Klein 
   
3. United States psychoanalyst (born in Austria) who was the first to specialize in the psychoanalysis of small children (1882-1960)
   Klein  Melanie Klein 
   

Klein in English Wiktionary