Surname Wiyak (Wiyak 
) , around the world, is a very rare last name. The cognomen Wiyak is habitual in Morocco, where it is a rare surname, and India, where it is an extremely rare surname. Very seldom, Wiyak is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Wiyak | Morocco, India |