The Ferrara family was famous for the manufacture of what? I've found Ferraras making olive oil, and some more making mirrors, but they're relatively modern. THE Ferraras don't seem to have manufactured anything - unless someone here knows better?
A notable member of the name was Andrea Ferrara (16th century). He was an Italian broad-sword maker, probably born in Ferrara. With his brother he was in great repute as an armourer in Belluno in 1585.
http://www.4crests.co...ara-coat-of-arms.html