Worldwide, Kailla (Kailla 
) is a rare mostly female, but uncommonly masculine first name. The forename Kailla is habitual in Cuba, where it is a rare female name, Brazil, where it is a very rare dominantly feminine, but infrequently masculine name, and Indonesia, where it is a very rare girly name. Very seldom, Kailla is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Kailla | Brazil, India, Indonesia, United Kingdom, Cuba |
| kailla dos anjos ferreira da paixão person identified in the Museu da Pessoa collection, BR (b. 1988) |
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