Cohn died at Sobibor, whereas Frank died in 1945 at a camp in northern Germany, Bergen-Belsen. Having uncovered the second pendant, researchers are seeking out relatives of both Cohn and Frank to discern if there is any relation between the families.

The Nazis’ insistence on meticulous records is what dooms them to eternal blame and incontrovertible evidence as to the extent of their crimes. They wanted to show how completely they had saved humanity from the ravages of genetic types like Jews, Roma, the disabled, Slavs, etc. So when I read any kind of…