Last name Ongson (Ongson 
) , in the world, is a very rare surname. The cognomen Ongson is characteristic of Philippines, where it is a very rare surname, Thailand, and China, where it is an extremely rare surname. Likewise, Ongson is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ongson | Philippines, China, United States, Thailand |