Sorry I don't have better information about your specific family but I'd like to add that my Granfather's (Capasso's) family is from the Naples area of Italy as well. The family is made up of Vincenzo and Agusta with 6 children, Lawrence, Daniel, Jerry, Camile, Florence and Edward.
I believe my grandfather, Jerry was the first of the children to be born in the United States. He was born in 1910. And is still alive today. So the family must have come into Ellis Island shortly before 1910.
Please feel free to e-mail me if you have any questions about my family.