Cognomen มงคลธวัช (Mongkoltawat 
, มงคลธวัช , Mongkhontawat) , in all the world, is a very rare last name. The surname มงคลธวัช is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, มงคลธวัช is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mongkoltawat, Mongkolthawat, มงคลธวัช | Thailand |