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