Cognomen Antonovych (Антонович 
, Antonovych 
) , all over the world, is quite a common surname. The surname Antonovych is characteristic of Belarus, where it is quite a common surname, Kazakhstan, where it is quite a rare surname, and Ukraine. Measured by absolute frequency, it most frequently occurs in Belarus, Russia, and Kazakhstan.
| VARIANT | COUNTRY |
|---|---|
| Антонович | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| Antonovych | Canada, Ukraine, Lithuania, United States |
Antanovich, Antanovič, Antonovich, Antonovič, Antonowicz, Antonowitsch, Antonowycz, Antonowytsch, Антановіч, and Антоновыч