Family name มหาศิริ (Mahasiri 
, มหาศิริ ) , throughout the world, is a rare last name. The last name มหาศิริ is characteristic of Thailand, where it is a rare surname, the United States, where it is an extremely rare surname, and India. Very seldom, มหาศิริ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mahasiri | United States, Thailand, India |
| มหาศิริ | Thailand |