My father was Waldemar Bara (1923-1993)and was from that region of Poland. He came from a place called Birkental, which as far as I can ascertain is now a suburb of Oppole - just up the road fron Katowice.
His father was Leopold and his mother Gertrude. He had two brothers - Ferdinand and Eryk and one sister Christine.
If this ties in with anything you have I would be interested to know.