Surname ثولين (Thulin 
, ثولين 
, Thoolen 
) , globally, is quite a common cognomen. The family name ثولين is characteristic of Northern Europe, particularly Sweden, where it is quite a common surname, Denmark, where it is quite a rare surname, and Norway. Measured by absolute frequency, it is commonest in Sweden, Myanmar, and the United States. Very seldom, ثولين is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thulin | Myanmar, Denmark, Sweden, United States, Netherlands |
| ثولين | Palestinian Territory |
| Thoolen | Germany, South Africa, United Kingdom, United States, Netherlands |