Also known as
Carlos (Spanish), Carlo (Italian), Karl (German/Scandinavian), Karel (Czech/Dutch)
Fun Fact
The name spread across Europe largely due to Charlemagne ('Charles the Great'), the medieval emperor whose Latin name, Carolus, gave rise to versions of Charles in many languages. Because Charlemagne's empire spanned so much of Western Europe, this is one of the clearest examples of a single ruler's name shaping naming trends continent-wide.