Surname Indreika (Indreika 
) , all over the world, is a very rare family name. The cognomen Indreika is characteristic of Lithuania, where it is a rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Indreika | Lithuania, United States |
| lionginas indreika (b. 1893) |
|