Surname Румянтцев (Румянтцев 
, Rumiantcev 
, Rumyantcev ) , all around the world, is a very rare family name. The last name Румянтцев is characteristic of Finland, where it is a rare surname, Russia, where it is a very rare surname, and Brazil, where it is an extremely rare surname. Measured by absolute frequency, it is commonest in Russia, Finland, and India.
| VARIANT | COUNTRY |
|---|---|
| Rumyantcev, Румянтцев | Russia |
| Rumiantcev | Russia, Finland, United States, India, Brazil |