Another thing to consider is that, after the conquest of Jerusalem in 78 CE, Jews spread through the Roman World. Gradually, the largest concentration of Jews formed in what is now Spain and Portugal. In the 1490's, the Jews were expelled from Spain and had to find other countries that would take them in. Some went to Egypt and the Middle East, some when up through France and Germany and Hungary into the Kingdom of Poland and Lithuania in the 1500's, and some went to Italy and Greece. So, perhaps you have a Sephardic Jewish ancestor in your family tree !
Good luck in your search.