Cognomen เอกอุ (Prime 
, เอกอุ 
, Ek-U ) , all around the world, is a common last name. The surname เอกอุ is habitual in Grenada, where it is quite a common surname, Trinidad and Tobago, and Luxembourg, where it is quite a rare surname. In absolute terms, it is the most numerous in Indonesia, France, and the United States. Also, เอกอุ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Prime | Democratic Republic of the Congo, France, Bangladesh, United States, Indonesia |
| เอกอุ, Ek-U | Thailand |