All over the world, Kalven (Kalven 
) is a rare principally boy's, but very seldom female forename. The first name Kalven is characteristic of South Africa, where it is a very rare boy's name, Philippines, and Brazil, where it is an extremely rare male name. In absolute terms, the name is most common in Philippines, the United States, and Brazil. Much less frequently, Kalven is the last name as well as the forename.