Disappearance of Sky Metalwala
Solomon said he believed that his son was alive, but perhaps not in the U.S. In spring of 2011, after the visit to the doctor that was the last independent record of Sky's presence outside of Biryukova's household, he recalled that her estranged father came from Ukraine to visit her. He wondered to the "Weekly" if the older man could have taken the boy back to that country with him at the time. But in 2013, he said that he did not know how that could have happened.
Salomon Oppenheim
Oppenheim Jr. and his wife Therese (Stein, born Deigen Levi) had 12 children. After Salomon's death, two of his sons, and Abraham, took over management of the bank. Another son, co-published the Rheinische Zeitung and was a railway industrialist. Salomon Jr.'s and Therese's daughter Bertha "Betty" Hertz née Oppenheim married Heinrich David Hertz (born as Hertz Hertz)—their son Gustav Ferdinand Hertz (born as David Gustav Hertz) with his wife Anna Elisabeth née Pfefferkorn later became parents of Heinrich Rudolf Hertz and Gustav Theodor Hertz, who in turn later became the father of Gustav Ludwig Hertz.