Cognomen Adaika (Adaika 
) , around the world, is a rare last name. The surname Adaika is habitual in Algeria, where it is quite a rare surname, and Germany, where it is an extremely rare surname. Very seldom, Adaika is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Adaika | Germany, Tanzania, United States, India, Algeria |