When my great grandmother(Adelina Rosanova nee DiNardo)came to Philadelphia with my great grandfather (Carmine Rosanova) they intially came to stay with her cousin Concetta. Her last name per a border crossing document I found here on Ancestry.com looks like Silimans or Silimano. Either of those last names ring a bell? Concetta lived at 358 East Mechanic Street, Philadelphia, PA.
From what I understand alot of Italians lived in this area of Philadelphia (A neighborhhod dubbed Germantown). The few block radius around Mechanic Street specifically. My great grandparents first lived at 414 the 432 Haines Street (literally one block from Mechanic Street). My great grandfather(Carmine Rosanova) was a very skilled cabinet maker and carpenter. He had a shop just down the street from Cousin Concetta at 366 East Mechanic Street. The family later sold the Haines street home and converted my great grandfathers shop on Mechanic Street to the family home.
Do you have any information on where your grandfather stayed when he was in Philadelphia? If it was in "Germantown" it is very likely he was realted to my greatgrandmother. Her mother's name was Lucia (Lucy) Cannata.