Surname Байза (Байза 
, Bayza 
, Bajza 
) , all over the world, is quite a rare cognomen. The family name Байза is habitual in Slovakia, where it is quite a rare surname, Croatia, and Hungary. Measured by absolute frequency, it is the most numerous in the Democratic Republic of the Congo, Slovakia, and Hungary. Much less frequently, Байза is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Байза | Kyrgyzstan, Russia, Kazakhstan, Ukraine |
| Bayza | Algeria, United States, Morocco, Democratic Republic of the Congo, Turkey |
| Bajza | Croatia, United States, Czechia, Slovakia, Hungary |