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