Surname Santo Agustin (Santo Agustin 
) , throughout the world, is an extremely rare cognomen. The last name Santo Agustin is characteristic of Southern Europe, particularly Spain, where it is a very rare surname. More prevalently, Santo Agustin is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Santo Agustin | Ecuador, Peru, Spain |