Surname Jansam (Jansam 
) , worldwide, is a very rare last name. The last name Jansam is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname, Indonesia, and Philippines, where it is an extremely rare surname. In absolute terms, this name is the most popular in Thailand, Indonesia, and India. Much less frequently, Jansam is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jansam | Thailand, India, Indonesia, Philippines |