Family name Yeonsil (연실 
, Yeonsil 
) , across the world, is a very rare last name. The cognomen Yeonsil is characteristic of Eastern Asia, particularly China, where it is an extremely rare surname. Much more frequently, Yeonsil is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 연실 | South Korea |
| Yeonsil | China, South Korea, Singapore, United States, Canada |