Examples of "brotherly nations"?

[Futurist]

Which examples of "brotherly nations" are there? For the record, I am talking about countries that share a common language (or at the very least have extremely similar languages), a common history (to some extent), a common heritage (to a significant extent), and a common religion (at least to a large extent).

Anyway, so far, I could think of:

-The Anglosphere countries:

They share a common language, were all former British colonies (thus inheriting things such as the legacy of a British legal system), are all white-majority with a heavy British Isles component (with Quebec being an exception to this rule), are all Christian-majority (largely Protestant but also a decent amount of Catholics), and are all rapidly diversifying.

-The East Slavic countries (Russia, Ukraine, and Belarus):

They have very close languages, are pretty similar peoples, were all part of the Russian Empire and/or Soviet Union, are all overwhelmingly Slavic, are all traditionally Eastern Orthodox countries (with atheism possibly becoming much more popular during the 20th century under Communist rule), and largely share a common history such as being a part of Kievan Rus' in the Middle Ages, participating in the Russian war effort against France and its allies in the Napoleonic Wars and against the Germans and their allies in both World Wars (with Galicia being an exception in regards to this due to them being a part of A-H during WWI and collaborating with the Nazis during WWII), and suffering under Communist rule for decades.

Anyway, which additional examples of "brotherly nations" are there, in your honest opinion?

 

[Tulius]

In Portugal we often, and traditionally, call to Brazil “país irmão” (literally “brother country” in Portuguese) and to the Spanish “nuestros hermanos” (literally “our brothers”, but in Spanish), even if in the last case the use of the Spanish can indicate and often indicates some irony.

Some politicians often also use the term “país irmão” to other countries, namely the PALOPs and East-Timor. But the use is not as common as for Brazil.

 

[Larrey]

Sweden late 1939...

Though it's not as if sibling rivalry isn't intense.

Same think with the Norwegians. "Söte bror", "Sweet brother", is a standard Norwegian reference to Sweden, and it can be deeply sarcastic – yet brother it is.

 

[duncanness]

The three Scandinavian Countries + Iceland, Greenland & Faroes.

 

[Naomasa298]

Canada and Australia have relatively little in common.

 

[Larrey]

The three Scandinavian Countries + Iceland, Greenland & Faroes.

Naoa... Sweden and Finland have a special thing – love-hating each other like only siblings can at least – that don't involve the Danes and Norwegians.

The Swedes and Danes have a weird kind of competition about which of them commands the greatest affection from the Norwegians, who tend to consider both too full of themselves (but Sweden tends to be considered ahead on points, and few things gladden the Norwegian heart like putting one over the Swedes, at whatever it might be).

The Swedes and Danes are old rivals, who today kind of like each other, while endlessly trash-talking the other regardless. It's more like the British and the French.

 

[Offspring]

Romania and the Republic of Moldova.

 

[Offspring]

They have very close languages, are pretty similar peoples, were all part of the Russian Empire and/or Soviet Union, are all overwhelmingly Slavic, are all traditionally Eastern Orthodox countries (with atheism possibly becoming much more popular during the 20th century under Communist rule), and largely share a common history such as being a part of Kievan Rus' in the Middle Ages, participating in the Russian war effort against France and its allies in the Napoleonic Wars and against the Germans and their allies in both World Wars (with Galicia being an exception in regards to this due to them being a part of A-H during WWI and collaborating with the Nazis during WWII), and suffering under Communist rule for decades.

It's still really odd to view Russia and Ukraine as brotherly nations nowadays.

 

[Naomasa298]

Aus-NZ.
Thailand-Laos.
Germany-Austria.

 

[Offspring]

Czechia and Slovakia.