Surname Rolby (Rolby 
) , all over the world, is a very rare last name. The surname Rolby is habitual in Latin America and the Caribbean, particularly Honduras, where it is a very rare surname, Venezuela, where it is an extremely rare surname, and Mexico. In absolute terms, it is the most numerous in the United States, Honduras, and Mexico. Much more prevalently, Rolby is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rolby | Mexico, Honduras, United States, Democratic Republic of the Congo, Cuba |