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