If you are wondering why the 'Katz' name was not 'handed' down >from
to generations, just realize that in Europe, marriages were not
until the couple went to the town/ city magistrate. If they were married
Torah but not according to the Secular courts yet and a baby was born in
the interim, the
child had the MOTHER's last name. Sometimes this was never straightened
Hence, it is possible that the name was changed that way.
New York, New York