The Most Noble William Montagu, 5th Duke of Manchester (October 21, 1771–March 18, 1843) was the son of George Montagu, 4th Duke of Manchester. The prefix The Most Noble is a title of quality attached to the names of dukes and duchesses in the United Kingdom. ... October 21 is the 294th day of the year (295th in leap years) in the Gregorian Calendar, with 71 days remaining. ... 1771 was a common year starting on Tuesday (see link for calendar). ... March 18 is the 77th day of the year in the Gregorian calendar (78th in leap years). ... 1843 was a common year starting on Sunday (see link for calendar). ... The Most Noble George Montagu, 4th Duke of Manchester PC (April 6, 1737–September 2, 1788) was the son of Robert Montagu, 3rd Duke of Manchester. ...

He was governor of Jamaica from 1808 to 1827, and prepared the colony for the emancipation of slaves. In 1815 he dealt with the aftermath of destruction of Port Royale by fire and of the plantations by a hurricane. This poster depicting the horrific conditions on slave ships was influential in mobilizing public opinion against slavery in the United Kingdom and the United States. ...

He married Lady Susan Gordon, daughter of Alexander Gordon, 4th Duke of Gordon, on 7 October 1793. They had four children: Alexander Gordon (1743 - 1827), 4th Duke of Gordon was a Scottish nobleman. ... October 7 is the 280th day of the year (281st in leap years). ... 1793 was a common year starting on Tuesday (see link for calendar). ...

• Lady Georgiana Frederica Montagu (d. 1892), married Evan Baillie and had issue.
• George Montagu, 6th Duke of Manchester (1799–1855)
• Lady Susan Montagu (c. 1801–1870), married George Hay, 8th Marquess of Tweeddale and had issue.
• Lady Caroline Catherine Montagu (c. 1804–1892), married John Calcraft and had issue.