He lived in Wołyń, 40k or so Czechs lived in Wołyń so it makes sense. But I don’t know which region of Czechia he came from, personally, I think he came from Cieszyn Silesia as he moved to the countryside and wasn’t very rich. Most people in Bohemia were either rich/educated or were ethnic Germans and hence “privileged”. Albeit if he was Silesian, chances are he had some German ancestor but that’s beside the point.