Last name พลอยแก้ว (Ploykaew 
, พลอยแก้ว, Phloikaeo) , worldwide, is a very rare family name. The surname พลอยแก้ว is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Likewise, พลอยแก้ว is the forename as well as the last name.