Surname Сумарев (Сумарев 
, Sumarev 
) , in the world, is a rare cognomen. The surname Сумарев is habitual in Belarus, where it is a rare surname, Croatia, and Russia. In absolute terms, it most frequently occurs in Eastern Europe, particularly Russia, Belarus, and Ukraine.
| VARIANT | COUNTRY |
|---|---|
| Сумарев | Kazakhstan, Russia, Ukraine, Belarus |
| Sumarev | Croatia, Russia, United States, Belarus |