Cognomen 병일 (병일 
, Byeongil 
, Byung-Il 
) , all over the world, is an extremely rare last name. The family name 병일 is characteristic of Northern America, particularly the United States, where it is an extremely rare surname. Much more prevalently, 병일 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 병일 | South Korea |
| Byeongil | United States, South Korea |
| Byung-Il | United States, South Korea, Canada |