king of the Franks (742-814), literally "Carl the Great," from French form of Medieval Latin Carolus Magnus (see Charles + Magnus).
Entries linking to charlemagne
Charles
masc. proper name, from French Charles, from Medieval Latin Carolus, from Middle High German Karl, literally "man, husband" (see carl).
Magnus
Scandinavian masc. proper name, popular with early kings, the first to use it was Magnus I, king of Norway and Denmark (d. 1047), who evidently took it in emulation of Charlemagne (Latin Carolus Magnus) under the impression that magnus (Latin, literally "great," from PIE root *meg- "great") was a personal name.