Cognomen Grado-Carrillo (Grado-Carrillo 
) , worldwide, is an extremely rare family name. The family name Grado-Carrillo is characteristic of Northern America, particularly the United States, where it is an extremely rare surname. Parts of the name also exists independently as a last name Grado, and a last name Carrillo.
| VARIANT | COUNTRY |
|---|---|
| Grado-Carrillo | United States |