Ciao, these are the correct names most likely, Italy has had a long history of growing figs and the names are generally correct what they call them. Alot of times the figs may be called something different just in another province or regione. I don't know the Napolitan dialect, I am Abruzzese, I would imagine the Troiano is one you are talking about. I am familiar with Fico Natalina, I have one and yes, in Italy they do produce around Christmas time hence the name Natalina, for Natale in Italian meaning Christmas. Natalina is very common in the Area you are talking about along with the region of Puglia. Okay, Ciao