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Surname Bayko (Байко
, Bayko
, Баико
) , globally, is quite a rare cognomen. The last name Bayko is characteristic of Eastern Europe, particularly Belarus, where it is quite a rare surname, Ukraine, where it is a rare surname, and Bulgaria. Not in comparison with a country's population, it is the most numerous in Eastern Europe, particularly Belarus, Russia, and Ukraine. Much less frequently, Bayko is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Байко | Kazakhstan, Russia, Bulgaria, Belarus, Ukraine |
| Bayko | Canada, Turkey, Poland, United States, Romania |
| Баико | Russia |