Family name Келерт (Келерт 
) , across the world, is a very rare cognomen. The cognomen Келерт is characteristic of Kyrgyzstan, where it is a very rare surname, Kazakhstan, and Ukraine, where it is an extremely rare surname. Not in comparison with a country's population, this name is the most popular in Kazakhstan, Kyrgyzstan, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Келерт | Russia, Ukraine, Kyrgyzstan, Kazakhstan |