The story she had told her children (and what we always believed) was that she was the daughter of a nobleman and a maid, who were to get married and come back for the baby (and there was a beautiful dress she was left in). Supposedly, when they came back, the adoptive family (farmers in Amalfi) claimed that she died so they couldn't reclaim her.
But from everything I'm reading, it was common to claim the baby belonged to some type of nobility, to save the reputation of the child. And according to this document, she was sadly left in rags.
But yes, what's odd is that there appears to have been nobility in Naples with that same name. But my understanding, even if the story were true and the nuns knew that, she wouldn't have retained that name?! I'm beginning to think the story was completely fabricated, but there are definitely some questions, especially since the name "de Curtis" seems to be pretty specific.
From Wikipedia: Toṭ was born Antonio Vincenzo Stefano Clemente on 15 February 1898 in the Rione Sanità, a poor district of Naples, the illegitimate son of Anna Clemente (1881–1947), a Sicilian woman, and the Neapolitan marquis Giuseppe de Curtis (1873–1944).
Would love to hear any other thoughts or ideas.