John Douglas, 9th Marquess of Queensberry

The Most Honourable The Marquess of Queensberry
Lord Queensberry in 1896
Tenure	6 August 1858 – 31 January 1900
Born	(1844-07-20)20 July 1844 Florence, Grand Duchy of Tuscany, Italy
Died	31 January 1900(1900-01-31) (aged 55) London, England
Spouse(s)	Sibyl Montgomery ​ ​ (m. 1866; div. 1887)​ Ethel Weeden ​ ​ (m. 1893; ann. 1894)​
Issue	Francis Douglas, Viscount Drumlanrig Percy Douglas, 10th Marquess of Queensberry Lord Alfred Douglas Lord Sholto Douglas Lady Edith Douglas
Parents	Archibald Douglas, 8th Marquess of Queensberry Caroline Margaret Clayton
Member of the House of Lords Lord Temporal
In office 6 August 1858 – 31 January 1900 Hereditary Peerage
Preceded by	Archibald Douglas, 8th Marquess of Queensberry
Succeeded by	Percy Douglas, 10th Marquess of Queensberry

John Sholto Douglas, 9th Marquess of Queensberry (20 July 1844 – 31 January 1900), was a British nobleman of the Victorian era, remembered for his atheism, his outspoken views, his brutish manner, for lending his name to the "Queensberry Rules" that form the basis of modern boxing, and for his role in the downfall of the Irish author and playwright Oscar Wilde.