Family name Ynacis (Ynacis 
) , around the world, is a very rare last name. The surname Ynacis is habitual in South-eastern Asia, particularly Philippines, where it is a very rare surname. Very seldom, Ynacis is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ynacis | Philippines, Venezuela |