Surname Hillario (Hillario 
) , throughout the world, is a very rare last name. The cognomen Hillario is habitual in Philippines, where it is a very rare surname, France, and the United States, where it is an extremely rare surname. Measured by absolute frequency, it is the most numerous in Philippines, the United States, and India. Also, Hillario is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Hillario | Philippines, France, Brazil, United States, India |