British Monarchy History. How did they die? This is a list of all the causes of death for the monarchs of the British Isles. These kings and queens have suffered a wide variety of fatalies, each a different class of death than the next. Of course there's a list of common diseases on here, but there's also the odd death, like accidental fall. Let's just hope it wasn't because the monarch didn't tie his/her shoes. Because that would be unfortunate.