I'm been playing around with GENI, creating an extensive family tree, and today discovered that the new FCC chairman (and friend of Obama from Harvard Law), Julius Genachowski, is my fourth cousin. We have common ancestry in the Tetenbaum family of Szczuczyn, Poland. I believe that all Tetenbaum descendants in the U.S. descend from the same relatively small family from Szczuczyn.

For a vivid description of early 20th century Jewish life in Szczuczyn, my grandmother's memoir can be found here.