The commonwealth countries - are a 'throwback' to the colonial days. Britain was a great sea-faring nation, keen on exploring. Newly discovered lands such as Australia, New Zealand etc., were claimed 'in the name of the King' - and subsequently became part of the British Empire.
Although many of those early countries are now independent nations, some still retain membership of the Commonwealth.
New members must "as a general rule" have a direct constitutional link to an existing member.
-"British Commonwealth", Wikipedia
When the countries are under the leadership of the commonwealth organization.
Commonwealth of Nations, formerly known as Commonwealth and British Commonwealth, is formed from the countries of the British Empire. Commonwealth of Nations contains 54 independent modern countries. Only Mozambique and Rwanda were not part of the former British Empire.
The British Empire today, is now called the British commonwealth, or Commonwealth Realms or Commonwealth of Nations
The British Commonwealth is an obsolete name for what is now called the Commonwealth of Nations. It is an association of some 54 independent, sovereign nations, most (but not all) of whom were once part of the British Empire
There's a whole lot more than three, and you didn't specify whether you meant Commonwealth Dominions (who acknowledge the British monarch as their own Head of State), or Commonwealth of Nations members (to whom the British monarch holds no status, but with which trade an other agreements exist with the British). Three Commonwealth Dominions include Canada, Australia, and Barbados. Three Commonwealth of Nations members who are not Dominions include South Africa (for better or worse), India, and Singapore.
The organization once known as the British Commonwealth is now called the Commonwealth of Nations, and, no, Chile is not a member.
The Commonwealth of Nations are all former colonies administrated/ruled by the United Kingdom. The British Empire 'evolved' into the Commonwealth of Nations after many of them gained independence.
No. The Commonwealth of Nations is composed of former British possessions, territories and protectorates. Puerto Rico was never a British colony and was never part of the Commonwealth of nations. Puerto Rico is a free associated state and commonwealth of the United States. In this case "commonwealth" is a territorial status and has nothing to do with the Commonwealth of nations or the United States Commonwealth states of Kentucky, Massachusetts, Pennsylvania and Virginia.
There are around 50 countries in the Commonwealth of Nations and all of them are self-governing.
In India.
Neither are members of the British Commonwealth of Nations
The British commonwealth of nations is largely composed of nations which were once part of the British empire.
British Commonwealth of Nations