Once there was Rus (about 9-15 centuries). Then there are different historical moments, different countries. And finally Ukraine, Belorussia, Rossia (17 century) (and maybe more that related to historical territory), not RUssia, but ROssia appeared. And in general, the Russians pronounce their country as RAssia.
In theory, Russians (from Rus, not rossians) can be called both Ukrainians and Belarusians. But that country (Rus, not Rossia) has long been gone (does not exist). And there are some historical disputes or inaccuracies about the Rossians' affiliation to Rus.
It is perhaps important to note that when Ukraine and Belarus left the USSR, Rossia's (17) relationship with Rus (9-15) became questionable.
Why has historically the name of Russia in English notRusskoje tsarstvo later changed with the creation of a new country to ROssia or RAssia?
And yes, the letters u, a, o in the words Russia, Rassia, Rossia were intentionally changedRossiyskoye tsarstvo.
Please refrain from politics. I am interested inWhy is the historical direction.
I apologize immediately for my English. I am a native speaker of the Ukrainian language. If you see a mistake in the words, please let me know about it.
Update
In my question, I did not focus on stress, I want to pay attention of using symbol "o" instead of symbol "u" in the name of the country.
For Ukrainians and Belarussians (those who still speak Belarusian), this symbol (u or o) indicates two different countries. And I'm curious why this name change has not historically affected the name of the country in English.
Update
It just seems that in English there is a country of Rus (Russia, why not Rossia), which has "Russia" not existed for about three centuries.spelled "Rossia"?
Update
Someone hacked my account and made changes "edited Dec 26 '19 at 20:38."
I will try to expand my question.
I'm sorry, for some reason I didn't see the conversation in the chat. And I can't write there anymore.
I noticed that in our history, country Tsardom of Russia is called as Moscovian tsarstvo. That is different names. No connection with Rus in this period. It's interesting maybe someone will.
For me, it's definitely interesting. This is the difference that can show the reasons if I can find something. And maybe you will suggest something.
I am not a professional historian. For me, it's just a hobby. As a spend 30 minutes a day to relax from everyday worries.
Update
It seems that I was denied help here. I'll look for it myself. Thanks to everyone who tried. And once again I pay attention that I speak not about how the name of the country is spoken, and about a difference in the name of the country after creation of new.
I will not delete the question, maybe someone will be found. Thank you.