Last name Buach (Buach 
) , around the world, is an extremely rare surname. The family name Buach is characteristic of Argentina, where it is an extremely rare surname, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Buach | United States, Argentina |
| jean nicolas buach (b. 1741) |
|
|
| josep garriga i buach Spanish physician, ES (b. 1777) |
|