Cognomen พลายแก้ว (Glass 
, Plaikaew 
, พลายแก้ว) , in the world, is a common surname. The surname พลายแก้ว is habitual in Guernsey, where it is quite a common surname, New Zealand, and the United States. In absolute terms, it most frequently occurs in the United States, the United Kingdom, and Germany. Very seldom, พลายแก้ว is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Glass | Australia, Germany, Canada, United Kingdom, United States |
| Plaikaew | United States, Thailand |
| Phlaikaeo | Thailand |