John Clavell died in Greenwich Hospital, Greenwich on 11 Mar 1846. He served in the Royal Navy.
Sons who served as naval officers: John Clavell
Entered Navy (1781)
Father-in-Law of William Simpson Blount.
• As First Lieutenant of Royal Sovereign, 100 (Captain Edward Rotheram), he took part in the Battle of Trafalgar (21 Oct 1805). Wounded.
• Captain of the Ordinary - Portsmouth (1825–1827)
• Captain Superintendent - Chatham Dockyard (7 Apr 1837–1841)