Hello there,
I am trying to find my grandfathers family in Poland.

Bronislaw Niedzwiecki was born 15 Jan 1924 in Kostryn, Poland. During the German invasion he was captured and sent to PoW camp in Hamburg, Germany.
He has a brother named John and a sister named Katharine as well as many other siblings. His mothers name was Katarzyna Niedzwieca.

The only information I have on him is after December 22, 1951 when he arrived in America.