Family name รุทธ์ (Rut 
, รุทธ์ 
) , worldwide, is a common surname. The surname รุทธ์ is characteristic of Israel, where it is a common surname, Iceland, where it is quite a common surname, and Honduras, where it is quite a rare surname. Not in comparison with a country's population, it is commonest in Israel, Mexico, and Spain. More prevalently, รุทธ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rut | Spain, India, Israel, Indonesia, Mexico |
| รุทธ์ | Thailand |