Apr 2 Charles Felix, Duke of Savoy and King of Sardinia (1821-31), dies at 74 Apr 4 Isaiah Thomas, American journalist, editor and historian (Massachusetts Spy), dies at 82 Apr 13 Ferdinand Kauer, Austrian composer, dies at 80 Apr 19 Johann Gottlieb Friedrich von Bohnenberger, German mathematician, dies at 65 Apr 20 John Abernethy, English surgeon, dies at 67 Mar 1831 Famous Deaths by Year May 1831 Famous People by Cause of Death Assassination Drug Overdose Gunshot Wound Murder Plane Crash Suicide