Cognomen Fias-Ayon (Fias-Ayon 
) , globally, is a very rare family name. The cognomen Fias-Ayon is characteristic of South-eastern Asia, particularly Philippines, where it is a very rare surname. Parts of the name also exists independently as a last name Fias, and a last name Ayon.
| VARIANT | COUNTRY |
|---|---|
| Fias-Ayon | Philippines |