Fontana di Trevi is a fountain in Rome, built in 1762. Does it have a (trustworthy) Latin name?
The Latin Wikipedia page uses the name Fontana Trebii, but no reference is given. This name appears to be related to the Roman name Trebius. However, I would expect an adjective (like Trebiana) instead of a genitive.
I imagine that the name of the fountain has something to do with the Trevi district of Rome. The linked English Wikipedia page says (without references) that the name Trevi comes from the Latin trivium. This is incompatible with the Latin name of the fountain mentioned above.
I would much appreciate it if there was a Latin document with the name of the fountain (or the district), but I have not been able to locate one.