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 | Democratic Republic of the Congo, Ethiopia, Germany, Papua New Guinea, India |
| Калау | Azerbaijan, Russia, Kazakhstan |
| Kahlau | Brazil, Germany, Poland, United States, Spain |