Last name Agustin Gregorio (Agustin Gregorio 
) , across the world, is an extremely rare cognomen. The surname Agustin Gregorio is habitual in Chile, where it is a very rare surname, and Spain. More prevalently, Agustin Gregorio is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Agustin Gregorio | Argentina, Spain, Ecuador, Chile, Peru |