My mother, Frieda Gerke, was married to Horst Dieter Salamon's father, Fritz Salamon. Her birth name was Gradtke.
Fritz Salamon was not Jewish. During WW II he was in the German army. This would not have been possible, if he or his ancestors had been Jewish. As my mother told me his mother's birth name was Salamon. Her husband "Buhl" was not his father.
My mother did not know who Fritz Salamon's father was. As Fritz Salamon was born in Duisburg it might be possible to find about it when having a look into the birth register of Duisburg.