Surname Niamnamtham (Niamnamtham 
) , worldwide, is a very rare family name. The cognomen Niamnamtham is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Niamnamtham | Thailand |
Namida, Nakrop, Thrisida, and Natthamonon