Hi Claudia
thank you for your email ... I had some relatives emigrated to AMERICA, in particular NEW YORK end '800 beginning '900.
Family origins are from Apulia , but I've no Fracesco name in my family ( oldest family was used to put the name of the grand father to their son ) At any case please find attached a web site ( english language )
http://www.maldarizzi.it/ricerca_genealogica.htm you can find LOSAVIO Families origin in CASTELLANETA that's a town nearby Taranto ( Apulia ) But really maybe we are relatives :-)