Cognomen ยิ้มทรัพย์ (ยิ้มทรัพย์, Yimsap 
) , throughout the world, is an extremely rare family name. The cognomen ยิ้มทรัพย์ is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Yimsap | Thailand |