Last name Калью (Kaliu 
, Kalju 
, Kalyu 
) , throughout the world, is a rare family name. The last name Калью is characteristic of Estonia, where it is quite a rare surname, Malawi, where it is a rare surname, and Norway. Not in comparison with a country's population, this name is the most popular in Malawi, Estonia, and Ethiopia. Likewise, Калью is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kaliu | Indonesia, India, Brazil, Malawi, Nigeria |
| Kalju | Norway, Estonia, Canada, Sweden, India |
| Kalyu | Ukraine, India, Brazil, Ethiopia, Nigeria |
| Калью | Ukraine, Kazakhstan, Russia |