The Bald was a grandson of Charlemagne who was king of France from 843-77.  
One king of this name and number, a 14th century ruler of Navarre called "the Bad," tried to poison the king of France.  Another, the Lame, was a king of Naples who fought unsuccessfully for Sicily until 1302.  One known as the Mad was the slow-witted Spanish monarch whose death led to the War of Spanish Succession.  The Bald was a grandson of Charlemagne who was king of France from 843-77.  FTP, give the name and number these men share with the "Merry Monarch" of England from 1660-85, the Stuart king who regained the throne in the Restoration.
One king of this name and number, a 14th century ruler of Navarre called "the Bad," tried to poison the king of France.  
Charles II