Nouns

(n)Klein, Felix KleinGerman mathematician who created the Klein bottle (1849-1925)
(n)Klein, Melanie KleinUnited States psychoanalyst (born in Austria) who was the first to specialize in the psychoanalysis of small children (1882-1960)
(n)Klein, Calvin Klein, Calvin Richard KleinUnited States fashion designer noted for understated fashions (born in 1942)