Cognomen Mellroth (Mellroth 
) , across the world, is a very rare last name. The cognomen Mellroth is habitual in Sweden, where it is a rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Mellroth | United States, Sweden |
| peter mellroth researcher, SE (b. 1967) |
|