Well...you have some things to check out. Found this:
In Pennsylvania, Order Sons of Italy in America, Enrollment and Death Benefit Records, 1910-1968 Record for James Fu Ferdinando Vigna Notation of James Vigna dying 8/31/1955. When he appiled in 1928, father Ferdinado has already died.
And this on the arrival of Ferdinando in PA from Canada:
name: Ferdinando Vigna
arrival date: 21 Jun 1913
arrival port: Buffalo, New York,
estimated birth year: 1837
birthplace: , Castiglione
birth country: Italy
race: Italian (South)
departure contact: Wife Saveria Castiglione
arrival contact: Son Anunziato
record has photo?: N
nara publication title: Manifests of Alien Arrivals at Buffalo, Niagara Falls, and Rochester, New York, 1902-1954
nara publication number: M1480
nara roll number: 151
Now, in the records, it lists the brothers and sisters of James: Domenico, Rosaria, and Francesco. The mother of these children, as well as of James (Annunciato) is Saveria Matrograno.
There is a marriage between Saveria and Gaetano Vigna, who was born in Nicastro. This is 1879 and about the time when the marriage should be expected, as Domenico, the first son, was born 1880. In that record, her parents are listed as Domenico and Susanna Longo. His parents are listed as "padre morte" (Father dead) and Rosalia Vigna. I do think that he is illegitimate unless his father carried the Vigna surname as well. He looks to have been born in Nicastro rather then Falerna. Look into the possibility that Gaetano and Ferdinando are one and the same.
You are going to have to access the records of Nicastro. Go to www.familysearch.org
and search for the catalog holdings.