Surname ครุธ (Kruth 
, ครุธ 
) , in all the world, is quite a rare last name. The family name ครุธ is characteristic of Sweden, where it is quite a rare surname, Germany, where it is a rare surname, and Finland. In absolute terms, it is the most numerous in Germany, the United States, and France. Very seldom, ครุธ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kruth | Belgium, Sweden, United States, Germany, France |
| ครุธ | Thailand |