Raiola is a name originating in Naples, Italy - probably when the Spanish rulers brought over ceramic specialists. My husband was from the suburbs of Naples (Boscotrecase/ Torre Annunziata). I researched his ancestry using the local archives on family search.org. Researching thru the records in early 19th century, the name was spelled RAJOLA - from the Spanish or Catalan - the letter J was not used in Italian. Gradually the name was "italianized" to RAIOLA - which is an abnormal combination of three vowels together. RAJOLA designates ceramics work. So the name is very specific to Naples and its region. Many poor Neapolitans immigrated to the USA end of 19th century - see the Ellis Island site.