Finding a name

I know this is a longshot but is there any way to find a list of Jewish soldiers who fought for Germany during ww1? a relative of mine fought on the western front during the war and was awarded the Iron Cross. All I know is that after the war he lost his business after the nazi rise to power and ultimately perished in the Holocaust. I desperately want to know more about him and his name. All I know is that his last name was Becker. I would ask family but the only person who would know more is my grandpa who I don’t have contact with. Any info or links would be greatly appreciated.