Family name Baydina (Байдина 
, Baydina 
) , in the entire world, is quite a rare cognomen. The cognomen Baydina is habitual in Russia, where it is a rare surname, Kazakhstan, and Belarus, where it is a very rare surname. In absolute terms, it is commonest in Russia, Kazakhstan, and Ukraine.
| VARIANT | COUNTRY |
|---|---|
| Байдина | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| Baydina | Germany, Russia, United States, Philippines |