Family name เซ็พ (Sep 
, เซ็พ 
) , around the globe, is quite a rare surname. The cognomen เซ็พ is habitual in Slovenia, where it is quite a rare surname, Guatemala, and Netherlands. Measured by absolute frequency, this name is the most popular in Indonesia, Guatemala, and Myanmar. Likewise, เซ็พ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sep | Myanmar, Poland, Netherlands, Indonesia, Guatemala |
| เซ็พ | Thailand |