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Cognomen Sitthinun (Sitthinun ) , throughout the world, is a very rare surname. The last name Sitthinun is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. More frequently, Sitthinun is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sitthinun | Thailand |
Sitthi, Dangmajang, Manitkul, Tansulawat, Norrakotr, Malithong, Muangthai, and Ieamsuksai