Surname Tongnaikaew (Tongnaikaew 
) , worldwide, is a very rare last name. The family name Tongnaikaew is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Tongnaikaew | Thailand |
Ajima, Sukanya, Uraiwan, Pattaramon, and Pattarapong