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Something I've just found out - Niceta is an Italian surname, though the spelling Nicita is more common. Both forms are mainly Sicilan, Niceta in the west of the island, Nicita in the East. The name does come from the Greek, and the Greek influence in Sicily and the Italian south (Magna Graecia) is strong.
Here's a thought, though not one I have much faith in. Patriziano could be title indicative of status, 'patrician'. So Antonius would be surnamed Niceta, and of patrician status. In time the title replaces the surname.
The strongest argument against this idea is that I would expect 'patrician' to be written in a church register in Latin, i.e., 'patricius'.