My mother recently passed away,and I would like to find out more about the region of Grunewald Silesia from which she was born. Also her family names of Kreisel(her mother's maiden name)and Exner(her stepfather's name).She used her mother's maiden name because of being born to an unwed widow in 1924. She didn't know her biological father or his last name unfortunetly.Thanks in advance to any help.