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Family name Koullas (Koullas
) , worldwide, is a rare surname. The last name Koullas is habitual in Cyprus, where it is quite a common surname, Greece, where it is a very rare surname, and Australia. In absolute terms, it most frequently occurs in Cyprus, the United Kingdom, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Koullas | Greece, Australia, Cyprus, United States, United Kingdom |