Last name รุทธิ์ (Rut 
, รุทธิ์ 
) , around the globe, is a common family name. The family name รุทธิ์ is habitual in Israel, where it is a common surname, Iceland, where it is quite a common surname, and Honduras, where it is quite a rare surname. In absolute terms, this name is the most popular in Israel, Mexico, and Spain. More frequently, รุทธิ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rut | Spain, India, Israel, Indonesia, Mexico |
| รุทธิ์ | Thailand |