Family name Ruangdet (Ruangdet 
) , worldwide, is a rare last name. The cognomen Ruangdet is habitual in Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname. Very seldom, Ruangdet is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ruangdet | United States, Thailand |