Regarding the spirit of the phrase being in the content of the book, not exactly. As I understand it, Machiavelli argued that, once an end is achieved, the means to have reached it are justified. But if the end isn't achieved, then they aren't. In other words, the legitimacy is derived upon succesful conclusion of the action, not its initiation. A fine distinction, but an important one.
As for the purpose of the book itself, I wasn't aware of the satiric interpretation, which is interesting. The interpretation I got when I studied it was that it was a way to ingratiate himself with Lorenzo De Medici to get a job after he was ousted from public service with the fall of the Republic. And yes, he was a republican through and through.
Over all though, good quiz, I barely got any of the more modern names.
Your're maybe referring to Marco Polo, whose commentary on his voyages to China were transcripted by a fellow inmate in the prison of Genua. His story ("Il Milione") was very much fantasy, but he actually was there and lived and worked there for years.
So no, Americas were NOT named after a liar.
The first practical radio transmitters and receivers were developed around 1895-6 by Italian Guglielmo Marconi
In fact, even Carreras and Domingo said so, I think Carreras even expanded on why that was in a famed 2000 interview, where he explained that by him ''being a born communicator'' and having an ''incredible charisma''.
While it always somewhat difficult to assess such vague concepts as ''fame'', I think the case is pretty clear cut here.