Family name Krairoj (Krairoj 
) , across the world, is a very rare surname. The last name Krairoj is characteristic of Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname. Much less frequently, Krairoj is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Krairoj | United States, Thailand |