Not a whole lot, except the Reiff family were quite numerous in Berks Co. Pennsylvania. Abraham and Hans Rieff came to Penn. in 1717 from Ibersheim, Palatinate. Hans settled in Salford, Penn. Abraham settled in Chester Co. Penn. They were also in Montgomery Co. Pa. I was surprised when I just looked to see what I had.I have seen the Rieff name during my Luxembourg research (I have done a lot of Luxembourg research) and of course the people of Luxembourg have many of German ancestry. I can help you there if you like.