Across the world, Келлен (Kellen 
, Келлен 
) is a common gender-neutral first name. The forename Келлен is habitual in Brazil, where it is quite a rare feminine name, the United States, where it is quite a rare predominantly masculine, but very infrequently feminine name, and Portugal, where it is a rare female name. Measured by absolute frequency, it most frequently occurs in Brazil, the United States, and Indonesia. Much less frequently, Келлен is the last name as well as the forename.