Family name Dayyam (Dayyam 
) , globally, is a rare last name. The cognomen Dayyam is habitual in India, where it is a very rare surname, and the United States, where it is an extremely rare surname. Also, Dayyam is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Dayyam | United States, India, Philippines |