Cognomen Malnov (Malnov 
, Мальнов 
) , across the world, is a rare last name. The surname Malnov is habitual in Kyrgyzstan, where it is a rare surname, Russia, and Kazakhstan, where it is a very rare surname. In absolute terms, it is the most numerous in Russia, Ukraine, and Kyrgyzstan.
| VARIANT | COUNTRY |
|---|---|
| Malnov | Russia |
| Мальнов | Kazakhstan, Kyrgyzstan, Russia, Ukraine |