Italians identified as Italians way before Italy was a state, Italia as a region was defined in the roman empire, and the populace recognize unity even under the different domination and independent kingdoms that rose and fall until unification.
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.
It's funny to observe how in these nationalistic debates about great figures in history, it's always Germans arguing that the person in German, Poles arguing that the person is Polish, Slovenians arguing that the person in Slovenian, etc. If these were honest debates, there might be a Pole arguing that the person is German, a German arguing that they're Slovenian, and a Slovenian arguing that they're Polish.
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.
I don't know if it was intentional, but Copernicus and Marie Curie-Skłodowska in an "who else" sentence like that sounds like partial setup for a well-known polish joke/meme from the movie "Sexmission", where few men wake up from cold sleep far in the future after war, to find a society composed of only women.
Treated like curios, there happens a dialogue that essentially goes:
(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..."
I'd say a pretty obvious test for "nationality" of Copernicus would be the fact that he fought on polish side in the wars in Prussia, as the royal prussian protectorate didn't exist at the time. But if you look using a later map, you might get confused on that.
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.
Chopin ends up a curious case since he is written and spoken the french way, without any mangling.
I heard of that film but I can't seem to find good subtitles for that particular movie. I've seen precious few actually, among which of course "How I started world war II"
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.