This question cannot be answered. Names do not have ancestry of this sort.
His paternal grandfather was Jewish.His other grandparents were not Jewish.
He was the first person to saw the cell wall under microscope.
Robert De Niro's mother is Jewish and according to Judiasm, if your mother is Jewish, so are you!
Robert Reich height 4 feet 10. 4' 10" http://transcripts.cnn.com/TRANSCRIPTS/0306/24/se.02.html