December 25 – Charles Chauncey, English physician (b. 1706) December 26 Dolly Pentreath, last-known fluent native speaker of the Cornish language (b. 1692) Ricardo Wall, Spanish-Irish cavalry officer (b. 1694) December 27 – Frederick Keppel, Church of England clergyman (b. 1728) December 30 – Maximilian III Joseph, Elector of Bavaria, Prince-elector of the Holy Roman Empire and Duke of Bavaria 1745–1777 (b. 1727) October 22 – Friedrich Baum, German dragoon Lieutenant Colonel of Brunswick in British service during the American Revolutionary War (b. 1748) References Further reading