Surname Won-Il (원일 
, Won-Il 
) , all around the world, is an extremely rare last name. Much more prevalently, Won-Il is the forename as well as the last name. Parts of the name also exists independently as a last name Won, and a last name Il.
| VARIANT | COUNTRY |
|---|---|
| 원일 | South Korea |
| Won-Il | United States |
| kim won-il South Korean boxer, KR (b. 1982) |
|