It’s also important to remember that Ukraine was an incredibly good area to farm, had easy trade connections and was outside the control of catholic nations - so it was an attractive destination for refugees of all kinds… that changed drastically when Tsarist Russia forced conformity (aka effectively a genocide) in the 1860s but before that point that area looked quite ethnicly diverse with an especially large Kazakh population.
It’s also important to remember that Ukraine was an incredibly good area to farm, had easy trade connections and was outside the control of catholic nations - so it was an attractive destination for refugees of all kinds… that changed drastically when Tsarist Russia forced conformity (aka effectively a genocide) in the 1860s but before that point that area looked quite ethnicly diverse with an especially large Kazakh population.