Just a shot in the dark. My great grandfather Stefano Pisani supposedly had a brother who moved to Sao Paulo. The interesting thing is that his sister Bettina married a Jack Giordano and came to the U.S. around 1900. They had a son Jack who moved to Elmont NY and a daughter Angeline. Maybe it was the fathers (Jack Giordano) brother who moved to Sao Paulo instead? I think they lived either in the NYC area or the Buffalo area.