Throughout the world, Калью (Kaliu 
, Kalju 
, Kalyu 
) is a rare gender-neutral first name. The first name Калью is habitual in Estonia, where it is quite a rare boy's name, Sweden, where it is a rare masculine name, and Russia, where it is a very rare masculine name. In absolute terms, this name is the most popular in India, Estonia, and Brazil. Also, Калью is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Kaliu | Brazil, India, Indonesia, Malawi, Nigeria |
| Kalju | Canada, Estonia, Norway, Sweden, India |
| Kalyu | Ukraine, Brazil, India, Ethiopia, Nigeria |
| Калью | Kazakhstan, Russia, Ukraine |
|
калью комиссаров Estonian actor, theatre and film director, EE (b. 1946) |
|
| паавер, калью леонхардович Estonian zoologist, EE (b. 1921) |
|
|
| терас, калью паулович Estonian teacher, EE (b. 1922) |
|
|
| караск, калью Estonian actor, singer and opera singer (1931-2011), EE (b. 1931) |
|
|
| оясте, калью Estonian biathlete, EE (b. 1961) |
|