Alongi is not as common in the US as it is in Sicily. My father was born in Realmonte, a small town near Agrigento. I visited three first cousins in the Realmonte area: Salvatore, Alfonso, and Leonarda Palermo. They were all married and had children.
I know he had a brother Salvatore who died, childless in 1941. He had several siblings who never made it to the US. One died in WW I.