Originally a short form of Kimberley, now established as an independent given name. The hero of Rudyard Kipling's novel Kim (1901) bore the name as a short form of Kimball (a surname used as a given name). In recent years, as a girl's name it has been borne by a number of well-known people, including the film stars Kim Novak (b. 1933) and Kim Basinger (b. 1953).
Finnish: ornamental name from koski ‘waterfall’, ‘rapids’. This was one of the many words denoting natural features that were used in the formation of Finnish surnames during the name conversion movement in the 19th and early 20th centuries. In the U.S. this is sometimes a shortened form of other Finnish surnames formed with this element, e.g. Kalliokoski, Ylikoski.