Family name พิลัยกุล (พิลัยกุล 
) , in all the world, is a very rare cognomen. The last name พิลัยกุล is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, พิลัยกุล is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| พิลัยกุล | Thailand |