Family name Yon-Ayan (Yon-Ayan 
) , across the world, is an extremely rare surname. The surname Yon-Ayan is characteristic of South-eastern Asia, particularly Philippines, where it is an extremely rare surname. Parts of the name also exists independently as a first name Yon, and a first name Ayan.
| VARIANT | COUNTRY |
|---|---|
| Yon-Ayan | Philippines |