Cognomen Deylan (Deylan 
) , globally, is a very rare family name. The cognomen Deylan is habitual in Honduras, where it is a very rare surname, Venezuela, and Turkey, where it is an extremely rare surname. Measured by absolute frequency, it is the most numerous in Turkey, Venezuela, and Mexico. More prevalently, Deylan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Deylan | Mexico, Colombia, Venezuela, United States, Turkey |