Family name Syvilai (Syvilai 
) , all around the world, is a very rare cognomen. The cognomen Syvilai is habitual in Laos, where it is quite a rare surname, and the United States, where it is an extremely rare surname. Much less frequently, Syvilai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Syvilai | Laos, United States |