Surname ศิมนัส (Simanas 
, ศิมนัส ) , in the world, is an extremely rare family name. The last name ศิมนัส is characteristic of the United Kingdom, where it is an extremely rare surname, and the United States. More frequently, ศิมนัส is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Simanas | United Kingdom, Thailand, United States, India, Lithuania |
| ศิมนัส | Thailand |