carl (n.)
c.1300, "bondsman; common man, man of low birth," from Old Norse karl "man, male, freeman," from Proto-Germanic *karlon-, the same root that produced Old English ceorl "man of low degree" (see churl).
The Mellere was a stout carle for the nones [Chaucer]
Carl
masc. proper name, from Middle High German Karl "man, husband" (see carl).