Coming from a family that was called Katz in Europe, but became Cohen
in America, I am wondering if any of you might be able to shed light
on this phenomenon. It must have been quite common: looking at the
Ellis Island database, I see that Katz appears 50% or so more often
than Cohen, while today Cohen is almost 3x more common in the US than
Katz. When did all of those Katzes become Cohens, and why?
Steven D. Cohen