My mother's mother was an Aiardo. Some in Chicago changed the spelling of their name to Airdo. They travelled to Chicago with Iorios, deFalcos, Pignatiellos, etc., from Acerra and Pomigliana d'Arco.
As near as I can figure from familysearch.org, (the LDS site), everyone in that town was related and I am my own distant cousin.
In the 1910 era migration according to ellisislandrecords.org, when you look at the manifests, you will see that the Nuzzi/Nuzzo/Muzzo's were married to Aiardos, Espositos, etc.
I'd be delighted to hear from anyone who knows what these names mean at firstname.lastname@example.org