my name is Oliver and I`m from Germany. MyGreat-grandmother was a Margareta Rosa Demankowski. She was born 5. December 1898 in Liessau West-Prussia. Her mothers names Helene Dombrowski and her father names was Johann Demankowski. I`m sorry, but I haven`t no more dates. Can you help me? Margareta was one of 5 children. I would be happy to a contact to you.