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.