Cognomen แสงโรจน์ไพเดช (แสงโรจน์ไพเดช 
, Sangrotphaidet , Saengrotphaidech ) , throughout the world, is a very rare last name. The surname แสงโรจน์ไพเดช is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Sangrotphaidet, แสงโรจน์ไพเดช, Saengrotphaidech | Thailand |