France had 18 kings with the name Louis. Louis is a popular French name, and 18 kings of France have borne this name since the 10th century. The most famous of these is Louis XIV, also known as the "Sun King," who ruled from 1643 to 1715. Other famous Louis kings include Louis IX, also known as Saint Louis, who was King from 1226 to 1270, and Louis XVI, who was King from 1774 to 1792 and was executed during the French Revolution.