Family name Sailak (Sailak 
, Сайлак 
) , across the world, is a very rare cognomen. The surname Sailak is habitual in Jordan, where it is a rare surname, Russia, where it is a very rare surname, and Thailand, where it is an extremely rare surname. Measured by absolute frequency, it is commonest in India, Russia, and Jordan. More frequently, Sailak is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sailak | New Zealand, India, Jordan, Thailand |
| Сайлак | Russia |