I have reviewed that website:ellisislandrecords.org and studied the four Saperias on record. Jacob was my fathers' grandfather. Interestingly the database also uncovered two people who emigrated from Italy with similar but not identical last names. As I understand it, a large contingent of Eastern European Jews moved to Italy in the 19th century; I will try to investigate this connection further. I have also uncovered a Saperia in Mexico from the 18th century.
The following Saperias emigrated from Leeds to the USA:
|NAME||RESIDENCE||ARRIVED||AGE ON ARRIVAL|
You can find out more about them by going to the Ellis island website: www.ellisislandrecords.org