Chaplin \ch(ap)-lin\ as a boy's name is of Middle English origin, and the meaning of Chaplin is "secretary". Occupational name. A chaplain was usually a minor ecclesiastical position, and has come to mean something like the spiritual guide of a secular organization, like a hospital chaplain. Actors Charlie Chaplin, Ben Chaplin. Chaplin has 3 variant forms: Chaplain, Chaplinn and Chappelin. View a list of the 2 names that reference Chaplin.