Cognomen Kalustov (Kalustov 
) , around the world, is a very rare last name. The family name Kalustov is habitual in Israel, where it is a very rare surname, Kazakhstan, and Germany, where it is an extremely rare surname. In absolute terms, it is the most numerous in the United States, Russia, and Germany. Very seldom, Kalustov is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kalustov | Germany, Kazakhstan, Russia, United States, Israel |