Family name Kaliu (Kaliu 
, Калью 
) , across the world, is a rare cognomen. The cognomen Kaliu is habitual in Malawi, where it is a rare surname, Malaysia, where it is a very rare surname, and Nigeria. Measured by absolute frequency, it is the most numerous in Malawi, India, and Indonesia. Likewise, Kaliu is the forename as well as the last name.