Last name Grégio (Grégio 
) , in the entire world, is an extremely rare cognomen. The surname Grégio is characteristic of Latin America and the Caribbean, particularly Brazil, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Grégio | Brazil |
| andré ricardo abed grégio Ph.D. Universidade Estadual de Campinas 2012 |
|