Cognomen 有作 (有作 
) , worldwide, is a very rare last name. The family name 有作 is characteristic of Eastern Asia, particularly China, where it is an extremely rare surname. More prevalently, 有作 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 有作 | China |
| 矢山 有作 Japanese politician, JP (b. 1924) |
|
|
| 屋良 有作 Japanese actor, voice actor and narrator, JP (b. 1948) |
|