Cognomen 洪涝 (洪涝 
) , in the world, is a very rare family name. The family name 洪涝 is habitual in Eastern Asia, particularly China, where it is an extremely rare surname. More frequently, 洪涝 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 洪涝 | China |