Last name Ao-Asen (Ao-Asen 
) , worldwide, is a very rare family name. The surname Ao-Asen is habitual in Philippines, where it is a very rare surname, and Canada, where it is an extremely rare surname. Parts of the name also exists independently as a last name Ao, and a first name Asen.
| VARIANT | COUNTRY |
|---|---|
| Ao-Asen | Canada, Philippines |