Cognomen Deiy (Deiy 
) , throughout the world, is a very rare last name. The cognomen Deiy is habitual in Venezuela, where it is an extremely rare surname, Nigeria, and Mexico. Measured by absolute frequency, it is commonest in India, Nigeria, and Venezuela. Much less frequently, Deiy is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Deiy | Philippines, Venezuela, Mexico, Nigeria, India |