Family name Modtad (Modtad 
) , in the entire world, is a very rare surname. The cognomen Modtad is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Modtad | Thailand |
Sankom, Siriwan, Wilaiwan, Kritsanee, and Nonthapohn