French and English form of Carolus, the Latin form of the Germanic name Karl, which was derived from a word meaning "man" (Proto-Germanic *karlaz). However, an alternative theory states that it is derived from the common Germanic name element *harjaz meaning "army".The popularity of the name in continental Europe was due to the fame of Charles the Great (742-814), commonly known as Charlemagne, a king of the Franks who came to rule over most of Europe. His grandfather Charles Martel had also bee...