Family name สิบเอก (สิบเอก 
) , worldwide, is an extremely rare cognomen. The last name สิบเอก is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Much more prevalently, สิบเอก is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| สิบเอก | Thailand |