+--George PIOTRKOWSKI  (1752-)
+--Martin PIOTRKOWSKI ALIAS WACH  (1782-)
|  +--Susanna WILAMOWSKIN  (1755-)
Sophia WACH 
|  +--Johann GIZEWSKÿ  (1760-1811)
+--Maria GIZIEWSKA  (1795-)
   +--Maria Elisabeth OBTUDOWNA