Family name Onsita (Onsita 
) , across the world, is a very rare cognomen. The cognomen Onsita is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname, and Philippines, where it is an extremely rare surname. Also, Onsita is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Onsita | Philippines, Thailand |