Family name Greylyn (Greylyn 
) , in the entire world, is an extremely rare surname. The cognomen Greylyn is habitual in Nicaragua, where it is a very rare surname, Venezuela, where it is an extremely rare surname, and the United States. More frequently, Greylyn is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Greylyn | Venezuela, Peru, United States, Nicaragua, Philippines |