Cognomen Mo-Oy (Mo-Oy 
) , worldwide, is a very rare surname. The surname Mo-Oy is characteristic of South-eastern Asia, particularly Philippines, where it is a very rare surname. Very seldom, Mo-Oy is the forename as well as the last name. Parts of the name also exists independently as a first name Mo.
| VARIANT | COUNTRY |
|---|---|
| Mo-Oy | Philippines |