Family name 罗索 (Rosseau 
, Rossow 
, 罗索 
) , in all the world, is quite a common last name. The cognomen 罗索 is characteristic of Belgium, where it is quite a rare surname, Germany, and Norway. In absolute terms, it is the most numerous in the United States, Germany, and Brazil. Much less frequently, 罗索 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rosseau | Germany, South Africa, Brazil, Belgium, United States |
| Rossow | Germany, Australia, South Africa, Brazil, United States |
| 罗索 | China |
| Rosow | Canada, Germany, United States, India |