(Disclaimer: personally acquainted with the author.)
On the other hand, the article about the theories of Christopher Columbus' origin  says: "The exact ethnic or national origin of Christopher Columbus (1451-1506) has been a source of speculation since the 19th century".
Considering this, and the fact that Italy became the nation we know around the 19th century, I wonder why the (semi-protected) article reads like that. I think it should be updated.
 - https://en.wikipedia.org/wiki/Christopher_Columbus
 - https://en.wikipedia.org/wiki/Origin_theories_of_Christopher...
There's also no doubt about Columbus origin, there's a bunch of rumors and propaganda amplified by people repeating them as if these are well researched theories - notice instead how a Norwegian is claiming it's Norwegian, a Portuguese it's claiming it's Portuguese, a Polish is claiming it's Polish.. and quite many of these writing were wrote during the rise of ultranationalisms across Europe. Not hard to figure out the pattern there.
Shame having to defend his Italianità after the tragedy of his actions, but still.
The most bitter debate I've ever seen of this nature is about the nationality of Copernicus. He lived in Royal Prussia, an autonomous dependency of the Kingdom of Poland. His native language was German, but he wrote in Latin, and he's known by the Latinized form of his name. He studied in Bologna. So was he Prussian, Polish, German or could Italy perhaps claim him? Or does none of this matter, because he was born long before the age of nationalism?
it's funny it's not like I ever had a debate or read about his nationality, until the topic came up with some Pole while talking about Chopin he also went and you know who else? Marie Curie and Copernicus and then it struck me we always call him "Nicola Copernico" in the school curricula (at least we used to in the nineties) and I just assumed it was Italian by name association alone, without even inquiring about his origins until much later in life, as the topic dropped.
I think a lot of these kind of factoid form into people mind for "absence of correction" more than active research on the topic.
(man, defending the idea that men could have produced exceptional works):
M1: "For example Copernicus"
W: "Liar, Copernicus was a woman!"
M1: "And Einstein?"
W: "was a woman too!"
M1: "And maybe Marie Curie-Skłodowska too!?"
M2: "uh, that was not the best example"
M1: "they confused me..."
As for naming, at least in some circles it used to be the norm to use local language forms of names - this for example led to such "polonized" names like
"William Szekspir" = William Shakespeare
"George Waszyngton" = George Washington, etc.
(As an American, I find this phenomenon extremely silly and very foreign feeling. I don't really care whether "my" ancestors get credit for something or not, especially given that national boundaries and people move around all the time. I find it vaguely nationalistic in the ugly sense. Maybe it's because there were plenty of great Americans who were clearly not born here in the first place?)
Most of the countries in the America are largely populated by immigrants and their descendants, and have a relatively shallow history of culture , which gives them few opportunities to engage in these arguments, and little reason to care about the result.
 I should note here that the fact that the modern countries do not derive authority from any pre-existing indigenous polities gives them little influence in the development of culture.
As the great British statesman George Washington once said: “Guard against the impostures of pretended patriotism.”
"sed etiam si cecidit de genu pugnat": And when he falls he fights on his knees. (On Providence II.VI)
This author (a practicing anthropologist) has a book going into more detail about his treatment of the natives.