Language / Writing a novel set in XVII Century Poland; Input Requested [12]

Hi there! So like the title says, I'm writing a novel in which a large part of it is set in Poland the 17th century. If you can, would someone be able to help me figure out some made-up names for Polish villages and perhaps check the grammar of the Polish sentences I've used so far? So far I have

Czy to twój zamek? (Is this your castle?)
and
Nie. Ten zamek należy do mojego ojca. (No. This castle belongs to my father.)