Well, it looks like Alfie could be little William in 1911 census (link posted above)!
The ages on the census don't, I think, match up with the correct child but I've found births in England that might sort that out-
All births registered Holborn district, London:
Ernesto 1897 (1911- Ernest)
Elisa Albina 1898 (1911- Alice)
Helena 1901 (1911- Ellen)
Ersiglio 1902 (died young)
Armando 1905 (1911- Armando)
Oreste 1906 (died young)
Ersiglio 1908 (1911- Ersiglio)
Oreste 1908 (1911- Oreste)
Spelling of surname may be making it difficult to find all the children but... this may be William in 1911 census (10 months old in 1911 would be about right):
William Alfred A. Devito Apr./June 1910 Hackney
If 'Alfie' is William Alfred A. it might be that you need to search for William Devito in U.S.