Worldwide, Agoncillo (Agoncillo 
) is a very rare masculine forename. The forename Agoncillo is habitual in South-eastern Asia, particularly Philippines, where it is a very rare boy's name. Much more prevalently, Agoncillo is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Agoncillo | Saudi Arabia, United Arab Emirates, Philippines, United States, Canada |
| gómez garceiz de agoncillo (b. 1200) |
|