Jean, duc Decazes was a French aristocrat and sportsman.

Born Jean-Élie-Octave-Louis-Sévère-Amanien Decazes de Glücksburg, 3rd Duc Decazes and 3rd Hertig af Glücksberg in Paris, on April 28, 1888 he married there Isabelle-Blanche Singer (1869–1896), a daughter of American sewing-machine millionaire Isaac Singer. They had three children:

• Louis Jean Victor Sévère (1889–1941). Has issue
• Marguerite Séverine Philippine, best known as Daisy Fellowes (1890–1962). Has issue.
• Jacques Louis Élie Decazes de Glücksberg (Paris, August 31, 1891 - Beaumont-en-Beine, March 15, 1916), unmarried and without issue.

His wife committed suicide in 1896 and their children were raised in large part by their aunt Winnaretta Singer, Princess Edmond de Polignac.

A member of the Yacht Club de France, Jean Decazes won a silver medal in sailing at the 1900 Summer Olympics. The following year he captured the 1901 Coupe de France with his sailboat Quand-Même II.

He died in Chantilly on August 31, 1912.

Source: Wikipedia