Proper nouns are a special type of names. In fact, when someone asks us our name, it is such a type of name we use in reply, i.e. Paul or Mohandas or Teresa or any such name.
Names of this kind are called Proper Nouns.
To clearly understand Proper Nouns, it is good to contrast them with Common Nouns. These latter are also names, but of a different kind. The examples below clearly illustrate the difference between these two types of nouns.
We can say that common nouns are ordinary names,
but proper nouns are special names.
See that in the examples above the first letter of every proper noun is a capital (upper case) letter. This is the convention in English.
Sometimes, this can be a problem. What about those proper names which have more than one word in them?
South Africa, West Bengal, South Korea, North Korea, Western Australia and East Timor,
north Kerala, eastern Australia, southern Europe, and even eastern South Africa.
The 'South' in South Africa and South Korea is part of the official names of these places. The 'north' in Kerala and the 'eastern' in Australia just tell us which part of Kerala or Australia we are talking about.
Even if you remember all the 'rules' or conventions about capitalization, you will still find educated people and reputed newspapers using their own sets of rules.
They are supposed to be unique names.
We don't ordinarily say that 'two Peters' or 'two Anns' have come to see you. We do say that two men or two women have come to see you.
Yes, they do.
We can say: Peter's money or Ann's house.