Here is the next confirmation received from old lady Mrs. Zofia Osiecka living in near the village Konczyska the village Wesolow:
I. She cannot tell if she is related, probably not, but she remembers that family Osiecki is still living in this Konczyska 2009 Poland.
II. She is confirming that the old and present local parish was/is Zakliczyn.
III. She tried answer your question to where the mother of your Konstanty Osiecki served two centuries ago: it's possible that she worked for (as many others there in the 19th century) in the local manor-house and farm named Luslawice, owned now in 2009 Poland by famous Polish music composer Krzysztof Penderecki, who reconctructed the manor-home, and here you can see some pics of this Luslawice manor-home: