Family name 義成 (義成 
) , across the world, is a very rare last name. The surname 義成 is characteristic of Eastern Asia, particularly China, where it is an extremely rare surname. More prevalently, 義成 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 義成 | China |
| 里見 義成 samurai of the early Kamakura period (b. 1157) |
|