I was compiling a list of common Ashkenazi Jewish surnames and their dominant Y-haplogroups when I found the Oppenheimer DNA Project. The original Oppenheimer family from the Rhineland-Palatinate appears to have belonged to Q1b. I verified the genealogy of the American theoretical physicist J. Robert Oppenheimer (of the Manhattan Project) and he is descended from Juda Löb Oppenheim from Worms. There are five project members belonging to Q1b, including two that claim descend from Juda Löb Oppenheim from Worms. So unless the genealogy is mistaken or a recent non-paternity event happened, we can assume that the father of the atomic bomb belonged to Q1b.