Stanisław Miecznikowski, son of Ludwik Miecznikowski

Ludwik Miecznikowski and his wife had at least one son that I know of, thanks to family input. His name is Stanisław Miecznikowski.

Stanisław Miecznikowski married _________.
They had three sons: 

Gabriel

Mark

Piotr

*I'm still hoping to find more information of these guys, their birth dates, who they married, etc. 

Michal Gabriel Miecznikowski

Michal Gabriel Miecznikowski married Agnieszka Jarzebska, and they had the following children together:

(Again, no order to this yet, as I don't have all the dates.)

1. Stefan Miecznikowski b.1888 d.1975

2. Stanisław Miecznikowski b.1901 d.1979

3. Felek or Felicjan Miecznikowski

4. Jan Miecznikowski

5. Juliusz or Julian Miecznikowski

6. Władysław Miecznikowski

7. Helena Miecznikowska