In all the world, Калау (Kalau 
, Калау 
, Kahlau 
) is quite a rare epicene first name. The given name Калау is characteristic of Kazakhstan, where it is quite a rare unisex name, Azerbaijan, where it is quite a rare boy's name, and Ethiopia, where it is a rare gender-neutral name. Measured by absolute frequency, it is the most numerous in India, Kazakhstan, and Ethiopia. Also, Калау is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Kalau | Ethiopia, India, Papua New Guinea, Germany, Democratic Republic of the Congo |
| Калау | Russia, Azerbaijan, Kazakhstan |
| Kahlau | Brazil, Poland, Spain, United States, Germany |