Mar 10 Princess Elizabeth of Clarence, second daughter of Duke and Duchess of Clarence, later King William IV and Queen Adelaide, dies at less than 3 months old Mar 23 Bernhard Anselm Weber, German pianist, conductor and composer, dies at 56 Feb 1821 Famous Deaths by Year Apr 1821 Famous People by Cause of Death Assassination Car Crash Hanging Killed in Action Plane Crash Poisoning