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