Surname Kàÿ (Kàÿ 
) , across the world, is a very rare last name. The cognomen Kàÿ is habitual in South-eastern Asia, particularly Myanmar, where it is a rare surname. More frequently, Kàÿ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kàÿ | Myanmar |