John Francis William
Born	(1825-08-25)August 25, 1825 Neuchâtel, Switzerland
Died	August 7, 1871(1871-08-07) (aged 45) Hillingdon, London, England

John Francis William de Salis, 6th Count de Salis (25 August 1825 – 7 August 1871) was a British diplomat that held the title of Count de Salis-Soglio.

He was the eldest son of Count Peter John de Salis by his second wife Cecile Henrietta Marguerite, daughter of David Bourgeoise of Neuchâtel.

After some education in London (Harrow) he was an attaché in Turin (October 1845-December 1849). Lived at Hillingdon. He was a JP for Middlesex. In 1860 he was commissioned into the 24th Middlesex Volunteer Rifle Corps. He was promoted lieutenant later that year and captain in 1861.

A renowned numismatist, he is recorded on a large board as one of the British Museum's major benefactors. John Warren, 3rd Baron De Tabley was a first cousin, and William Fane De Salis an uncle.

He married (Iver, 1 February 1862) Amelia Frances Harriet, daughter of Christopher Tower, JP DL MP, of Huntsmoor Park, Iver and Weald Hall, Essex, by his wife Lady Sophia Cust, eldest daughter of the first Earl Brownlow.

In 1881 Burke's records the Countess at 7, Athlestone Terrace, Cromwell Road, London (where she died in 1885), and as at Grange Hill, Kilmallock, Ireland.

Catherine Sophia (Katie) (29.1.1863-), John Francis Charles (1864-) and Henry Rodolph (Rudie) (1866-).

• Quadrennial di Fano Saliceorum, volume one, by R. de Salis, London, 2003.
• De Salis Family : English Branch, by Rachel Fane De Salis, Henley-on-Thames, 1934.
• Burke's Irish Family Records, ed. Hugh Montgomery-Massingberd, Burke's Peerage Ltd, London, 1976.
• A genealogical and heraldic History of the Colonial Gentry, by Sir (John) Bernard Burke, CB, LLD, vol. 2, London, 1895/1899 (pages 574–77).
• Burke's Peerage, Foreign Noblemen / Foreign Titles sections: 1851, 1936, 1956, etc.
• Debrett's Peerage, Foreign Titles section, 1920, etc.
• Der Grafliche Hauser, Band XI [volume 11], Genealogisches Handbuch Des Adels, C. A. Starke Verlag, Limburg an der Lahn, 1983 (pps 331–356).
• Armorial Families, a directory of Coat- Armour, compiled by Arthur Charles Fox-Davies, volume 1, 1929.
• Obituary in the Numismatic Chronicle 1872, pp. 10–12.
• John Allan, 'The early history of the Department of Coins and Medals', BM Quarterly, 1953, p. 76.