Count Wilhelm Hans Fredrik Wachtmeister (29 April 1923 – 3 February 2012) was a Swedish career diplomat who served as the Swedish Ambassador to the United States for 15 years from 1974 to 1989, eventually becoming the Dean of the Diplomatic Corps in 1986, as the longest-serving ambassador in the diplomatic corps in Washington, DC. (en)
Wilhelm Hans Fredrik Wachtmeister, född 29 april 1923 på Wanås, Gryts församling, Lunds stift, Kristianstads län, död 3 februari 2012 i Hedvig Eleonora församling, Stockholm, var en svensk greve och diplomat. (sv)
Count Wilhelm Hans Fredrik Wachtmeister (29 April 1923 – 3 February 2012) was a Swedish career diplomat who served as the Swedish Ambassador to the United States for 15 years from 1974 to 1989, eventually becoming the Dean of the Diplomatic Corps in 1986, as the longest-serving ambassador in the diplomatic corps in Washington, DC. (en)
Wilhelm Hans Fredrik Wachtmeister, född 29 april 1923 på Wanås, Gryts församling, Lunds stift, Kristianstads län, död 3 februari 2012 i Hedvig Eleonora församling, Stockholm, var en svensk greve och diplomat. (sv)