+--Baltazar KOZLOWSKI 
+--Piotr KOZLOWSKI  (1864-)
|  +--Rozalia ZDROJEWSKA 
Jan KOZLOWSKI  (29 MAY 1889-12 JAN 1898)
|        +--Maciej SZEFLER 
|     +--Jozef SZEFLER, SR  (1821-BEF MAR 1878)
|     |  +--Maryanna WICHROWSKA 
|  +--Jan SZEFLER  (9 JUN 1845-)
|  |  |  +--Jan KRASUCKI  (ABT 1779-11 NOV 1833)
|  |  +--Jadwiga KRASUCKA  (1822-9 MAR 1878)
|  |     |  +--Krzysztof KRAJEWSKI 
|  |     +--Tekla KRAJEWSKA  (1783-26 NOV 1873)
|  |        +--Marianna STUPSK 
+--Maryanna SZEFLER  (21 MAR 1868-)
   +--Berta ECHERT  (1844-)