Cognomen สัจพจน์ (Axi 
, สัจพจน์ , Satjapot 
) , all around the world, is a rare last name. The last name สัจพจน์ is habitual in Greece, where it is a rare surname, Sweden, and Romania. In absolute terms, it is the most numerous in Greece, Romania, and Argentina. Also, สัจพจน์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Axi | China, Indonesia, Romania, Thailand, Argentina |
| สัจพจน์ | Thailand |
| Satjapot | United States, Thailand |
ปัญโญ, อัตนวานิช, and สิงห์สวัสดิ์