Surname Grengo (Grengo 
) , in all the world, is a very rare last name. The cognomen Grengo is characteristic of Tunisia, where it is a rare surname, Malaysia, where it is an extremely rare surname, and the United States. Also, Grengo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Grengo | Tunisia, Malaysia, Philippines, United States, Brazil |