Family name Keovilaythong (Keovilaythong 
) , around the globe, is a rare cognomen. The surname Keovilaythong is habitual in South-eastern Asia, particularly Laos, where it is quite a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Keovilaythong | Laos |
Boualam, Tiengngeun, Channapha, and Tiengphathay