Hello I need help finding information on my grandad (Jan Jozef Dziubany 1920-1985) he was born in Katowice in 1920 however his father was not on the birth certificate, his mother was Anna Dziubany and I hear she lived there all her life. My Nan who he married here in England believes he had a half brother who I have a photo of but no name... in the photo was his wife, two boy twins and his daughter krystyna Dziubany. I cannot find any records etc on these and I feel I'm at an end.
If anyone could help with anything that would be super
Thanks
Laura