Surname 曰燕 (曰燕 
) , in all the world, is a very rare family name. The cognomen 曰燕 is characteristic of Eastern Asia, particularly China, where it is an extremely rare surname. More prevalently, 曰燕 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 曰燕 | China |