Cognomen ละอองแก้ว (ละอองแก้ว, Laongkaeo 
) , all over the world, is a very rare family name. The cognomen ละอองแก้ว is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Laongkaeo | Thailand |
Laaongkaew, Laledkaew, Laokaemkaew, Laongkaew, Laongkaw, Launkaeo, and Launkaew