Surname Eustacquio (Eustacquio 
) , in all the world, is an extremely rare family name. The family name Eustacquio is habitual in South-eastern Asia, particularly Philippines, where it is an extremely rare surname. More prevalently, Eustacquio is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Eustacquio | Philippines |