Family name อรช (อรช 
) , throughout the world, is an extremely rare last name. The last name อรช is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Much more frequently, อรช is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| อรช | Thailand |
เกิดโภคา, บัญชาวัฒนะ, and สินสมบัติสุข