Charles Cornwallis, 1st Marquess Cornwallis | Robert Gascoyne-Cecil, 3rd Marquess of Salisbury | Marquess | Francis Rawdon-Hastings, 1st Marquess of Hastings | Richard Wellesley, 1st Marquess Wellesley | Marquess of Bute | Wills Hill, 1st Marquess of Downshire | James Broun-Ramsay, 1st Marquess of Dalhousie | David Cecil, 6th Marquess of Exeter | Robert Grosvenor, 1st Marquess of Westminster | Henry Paget, 1st Marquess of Anglesey | Frederick Hervey, 8th Marquess of Bristol | Frederick Hamilton-Temple-Blackwood, 1st Marquess of Dufferin and Ava | Victor Hervey, 6th Marquess of Bristol | Robert Wynn Carrington, 1st Marquess of Lincolnshire | Marquess of Rockingham | Marquess of Lansdowne | marquess | John Neville, 1st Marquess of Montagu | Freeman Freeman-Thomas, 1st Marquess of Willingdon | Paul Marquess | Marquess of Milford Haven | Marquess of Anglesey | Marquess of Ailsa | John Hamilton-Gordon, 1st Marquess of Aberdeen and Temair | William Parr, 1st Marquess of Northampton | Victor Hope, 2nd Marquess of Linlithgow | Marquess of Sligo | Marquess of Salisbury | Lawrence Dundas, 3rd Marquess of Zetland |
The Douglas family of the second creation are the same of the same lineage as the Marquesses of Queensberry (note the appearance of the middle name Sholto in both families) and are also related to the later Earls of Home.
Clarke represented Oscar Wilde in his ill-advised prosecution of the Marquess of Queensberry for criminal libel.
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His legal career included representing Oscar Wilde in his disastrous prosecution of the Marquess of Queensberry for libel, and representing the plaintiff in the "Baccarat Case", during which Sir Edward cross-examined the Prince of Wales.
Other authors included Andrew Lang, Egyptologist W. M. Flinders Petrie, Lady Florence Dixie (feminist sister of the infamous Marquess of Queensberry), Max O'Rell, Louis Fagan of the British Museum, J. A. Fuller Maitland, Grant Allen, and Count Eric Stenbock.
The bitter feud between Lord Alfred's father the Marquess of Queensberry and his son resulted in Wilde sueing the Marquess for libel at Douglas’s urging.
Lord Francis Douglas (1847–1865), son of Archibald Douglas, 8th Marquess of Queensberry who was killed in the first successful ascent of the Matterhorn
John Graham Chambers (1843–1883), codified the "Marquess of Queensberry rules", upon which modern day boxing is based