Carolus may refer to: People Carolus (name) the medieval Latin form of the name Charles Charlemagne (742–814) King Charles XII of Sweden, who is sometimes referred to as "Carolus Rex" Scientific Carolus (plant), a genus of flowering plants in the family Malpighiaceae Carolus (bug), a genus of insects in the family Cixiidae 16951 Carolus Quartus, an asteroid Miscellaneous Carolus (coin), several coins Carolus, several ships; see List of Swedish ships of the line See also Carl (name) Charles Karl (disambiguation)