Dorothy Montagu, Countess of Sandwich (22 March 1716/17 - Barnes 17 July 1797), formerly The Hon. Dorothy Fane, was a British peeress. July 17 is the 198th day (199th in leap years) of the year in the Gregorian calendar, with 167 days remaining. ... 1797 (MDCCXCVII) was a common year starting on Sunday (see link for calendar) of the Gregorian calendar (or a common year starting on Wednesday of the 11-day-slower Julian calendar). ...

Baptised 27 April 1717 at St. Giles in the Fields.

Dorothy was the third surviving daughter of Charles, 1st Viscount Fane (1676-1744) by his wife Mary (1686-1762) daughter of the envoy hon. Alexander Stanhope, FRS. Mary was the sister of soldier-statesman James, 1st Earl Stanhope (1673-1721), and was one of the six original Maids of Honour to Queen Anne, appointed 4th June 1702. James Stanhope, 1st Earl Stanhope (c. ...

Dorothy married at St. James's 14 March 1740/41, John Montagu, 4th Earl of Sandwich. John Montagu, 4th Earl of Sandwich, 1783, by Sir Thomas Gainsborough For other persons of the same name, see John Montagu. ...

They separated in 1757 or 1754 and she was granted an apartment in Windsor castle with an elder sister Elizabeth. She also lived at the Fane's Thames-side New House at Basildon, Berkshire.

She was declared 'De Lunatico Inquirendo' in May 1767.

Her brother Charles, 2nd Viscount Fane, died without issue and his estates in Berkshire, Armagh, and Limerick where inherited by her and her surviving sister Mary, Madame de Salis, Countess de Salis, wife to Jerome, 2nd Count de Salis. Jerome, Count De Salis Image:Wappen-Salis. ...

References

• R. de Salis, Quadrennial di Fano Saliceorum, volume one, London, 2003

printed (History of Parliament, GEC, VCH), manuscript & family knowledge.