Surname カルキ (カルキ 
, Karuki 
, Kärki 
) , around the globe, is quite a rare cognomen. The surname カルキ is habitual in Finland, where it is quite a rare surname, Kenya, and Sweden. In absolute terms, it is the most numerous in Japan, Kenya, and Finland. Very seldom, カルキ is the forename as well as the last name.