Cognomen Cruz-Buan (Cruz-Buan 
) , around the globe, is an extremely rare family name. The last name Cruz-Buan is habitual in South-eastern Asia, particularly Philippines, where it is an extremely rare surname. Parts of the name also exists independently as a last name Cruz, and a last name Buan.
| VARIANT | COUNTRY |
|---|---|
| Cruz-Buan | Philippines |