All around the world, พันธ์เอก (พันธ์เอก 
) is a very rare boy's forename. The first name พันธ์เอก is habitual in South-eastern Asia, particularly Thailand, where it is a very rare masculine name. More prevalently, พันธ์เอก is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| พันธ์เอก | Thailand |