Ivan Boszormenyi-Nagy
（重定向自Contextual therapy）
Ivan Boszormenyi-Nagy (May 19, 1920 – January 28, 2007) was a Hungarian-American psychiatrist and one of the founders of the field of family therapy. Born Iván Nagy, his family name was changed to Böszörményi-Nagy during his childhood. He emigrated from Hungary to the United States in 1950, and he simplified his name to Ivan Boszormenyi-Nagy at the time of his naturalization as a US citizen.