my dears, this time, I am not kidding nor joking.
I think the nicknames Nicchia, Ciolla, Tetella and Petite are words with 2 (ore more) meanings. Ones could be heavily sexual . But I have to verify carefully. That's popular language, low speaking. Those things are generally not on the web, and sometimes neither into books. I have to ask a friend living near Napoli for the actual meanings and a specialist of popular languages for their senses at the times of Ferdinando 2 .
Best regards from your devoted
Monsieur Canard