What we learn from Einseidler, Part 3

In part 1, I summarized the Einseidler papers. In part 2, I covered Einseidler's discoveries about the descendants of Moshe Joseph Spektor. Here, I will do the same for the descendants of Jacob David Spektor.

The most surprising thing we learn about Jacob David is that he marries a woman 31 years his junior (to be continued).