Cognomen Sikoy (Sikoy 
) , all over the world, is a very rare family name. The last name Sikoy is habitual in Tanzania, where it is a very rare surname, and Philippines, where it is an extremely rare surname. Much less frequently, Sikoy is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sikoy | India, Philippines, Tanzania |