Cognomen Delmacio (Delmacio 
) , worldwide, is a very rare last name. The family name Delmacio is habitual in Myanmar, where it is a very rare surname, Argentina, and Philippines, where it is an extremely rare surname. More frequently, Delmacio is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Delmacio | Philippines, Mexico, Argentina, Myanmar, Brazil |