Cognomen Dayad (Dayad 
) , in the entire world, is a rare last name. The cognomen Dayad is habitual in South-eastern Asia, particularly Indonesia, where it is a very rare surname, Malaysia, where it is an extremely rare surname, and Philippines. Not in comparison with a country's population, it is the most numerous in India, Indonesia, and Philippines. Also, Dayad is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Dayad | Philippines, United States, India, Indonesia, Malaysia |