Hey Dennis, I have quite a lot of WITKOWSKI / WITTKOWSKI, but as you look in the GRAUDENZ area, I think is about 70 km from SCHÖNECK away, I don't know if I should go through all my documents I have. Let me know, than I will have a look of course.....( have 7 birth, 4 marr. and 3 death)
here one information for your KOWALLEK name, all what I have in my files:
SZADRAU : belongs to the rom.cath.church SCHÖNECK KR. BERENT WESTPRUSSIA
21.11.1865 * AUGUST FRANZ from Franz ENGLER + Marianna KOWALEK witness: Joseph and Barbara FRAEDA
Good luck..........
Bye, bye Sigi from PARIS