Throughout the world, カイス (Kais 
, Qais 
, Qays 
) is a common masculine given name. The given name カイス is habitual in Tunisia, where it is a common masculine name, Oman, where it is quite a common boy's name, and Jordan (explore the name in all countries). In absolute terms, the name is most common in Tunisia, Afghanistan, and Algeria. Likewise, カイス is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Kais | Iraq, Tunisia, Pakistan, India, Algeria |
| Qais | Iraq, Tunisia, Pakistan, Afghanistan, Algeria |
| Qays | Iraq, United Arab Emirates, Jordan, Syria, Saudi Arabia |