Surname Olayvanh (Olayvanh 
) , in the world, is an extremely rare cognomen. Much more frequently, Olayvanh is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Olayvanh | Laos, United States, Australia |
Syphengphet, Buentello, Souphavongtay, Khamphanhoth, Chounramany, Khanthavong, Phanthavong, and Phommavongsa