my father Jozef Nawrot
Really? Wow.
I just read up, and found this in wikipedia :(
"Pozostał na emigracji do końca życia, nie utrzymywał kontaktów ze znajomymi w kraju."
It also mentioned that towards the end of his career, he played for Polonia Warsaw, perhaps it might be worthwhile to contact them in addition to Legia?
He took part in Market Garden as well, if you have information on who he was with, that might be a good route for finding information as well.