Last name ลัพธ์ (Lap 
, ลัพธ์ 
) , in all the world, is a common cognomen. The last name ลัพธ์ is habitual in Taiwan, where it is quite a common surname, Slovenia, where it is quite a rare surname, and Hong Kong. Measured by absolute frequency, the name is most common in Taiwan, Malaysia, and Netherlands. Likewise, ลัพธ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Lap | Malaysia, Taiwan, United States, Vietnam, Netherlands |
| ลัพธ์ | Thailand |