Cognomen Mabay (Mabay 
) , in the entire world, is a very rare last name. The last name Mabay is habitual in Philippines, where it is an extremely rare surname, Canada, and the United States. Not in comparison with a country's population, it is commonest in Philippines, the United States, and India. More frequently, Mabay is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mabay | Spain, Philippines, United States, India, Canada |