Surname Калван (Kalvan 
, Калван 
) , all around the world, is a rare family name. The surname Калван is characteristic of Estonia, where it is a rare surname, Russia, where it is a very rare surname, and Ukraine. Not in comparison with a country's population, it is commonest in Russia, Brazil, and India. Also, Калван is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kalvan | Russia, United States, Tanzania, India, Brazil |
| Калван | Russia, Ukraine |