Family name Macias Sanmartin (Macias Sanmartin 
) , across the world, is a very rare surname. The family name Macias Sanmartin is habitual in Ecuador, where it is a very rare surname, Spain, where it is an extremely rare surname, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Macias Sanmartin | Spain, United States, Ecuador |