Around the world, Romero-Millan (Romero-Millan 
) is an extremely rare unknown gender given name. Much more prevalently, Romero-Millan is the last name as well as the forename. Parts of the name also exists independently as a last name Romero, and a last name Millan.
| VARIANT | COUNTRY |
|---|---|
| Romero-Millan | United States |