Mercer, American Revolutionary War officer, mortally wounded in battle (b. 1726) January 13 – James Rait, Anglican clergyman, Scottish Episcopal Church Bishop of Brechin 1742–1777 (b. 1689) January 27 – Hubert de Brienne, French naval commander (b. 1690) January 30 – Enrichetta d'Este, Duchess of Parma (b. 1702) February 9 Captain Abraham Godwin, American marine on USS Washington (1776 row galley) (b. 1724) Seth Pomeroy, American gunsmith and soldier (b. 1706) February 11 – Sir Gilbert Elliot, 3rd Baronet, of Minto, Scottish statesman, philosopher and poet (b. 1722) February 24 – King Joseph I of Portugal (b. 1714) February 28 – Joab Hoisington, American major (b. 1736) March 1 Józef Aleksander Jabłonowski, Polish nobleman (szlachcic) (b. 1711) Georg Christoph Wagenseil, Austrian composer (b. 1715) March 2 – Empress Xiaoshengxian, mother of the Chinese Qianlong Emperor of China (b. 1692) March 4 – Pierre-Herman Dosquet, 4th bishop of Quebec (b. 1691) March 6 – Jeremias Friedrich Reuß, German theologian (b. 1700) March 10 – John the Painter, British criminal (b. 1752) March 20 – Jean-François-Joseph de Rochechouart, French Roman Catholic Cardinal (b. 1708) March 23 – Sir Hugh Paterson, 2nd Baronet, Scottish Jacobite and Member of the Parliament of Great Britain (b. 1685) March 31 – Richard Terrick, Church of England clergyman, Bishop of Peterborough 1757–1764 and Bishop of London 1764–1777 (b. 1710) April–June April 7 – Anna Chamber, British noblewoman and poet (b. 1709) April 29 – Antonio Joli, Italian painter of vedute and capricci (b. 1700) May 5 – Raphael Hayyim Isaac Carregal, Palestinian rabbi preaching in the Americas (b. 1733) May 7 – Jean-Baptiste Nicolas Roch de Ramezay, marine captain and colonial administrator in New France (b. 1708) May 9 – Heneage Finch, 3rd Earl of Aylesford, Member of the Parliament of Great Britain (b. 1715) May 11 – George Pigot, 1st Baron Pigot, British governor of Madras (b. 1719) May 19 – Button Gwinnett, a signatory of the American Declaration of Independence (b. 1735) May 22 – David Wooster, American general in the French and Indian War and in the American Revolutionary War (b. 1711) May 28 – William Douglas, American military officer, leading regiments from Connecticut in the American Revolutionary War (b. 1742) May 31 – Henry Fane of Wormsley, English politician (b. 1703) June 8 – Cornelia Schlosser, sister and only sibling of Johann Wolfgang von Goethe to survive to adulthood (b. 1750) June 21