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