A proper noun becomes a common noun when used as a name that may be applied to any one of a class of objects.
The name of anything personified is regarded as a proper noun and is usually written with a capital letter.
A proper noun is the name of a particular person, place, or thing.
Although a proper noun is the name of a particular person, place, or thing, that name may be given to more than one individual.
Scott's is a proper noun, of the third person, singular number, masculine gender, and possessive case.
A proper noun is the name of some particular individual, or people, or group.
Hannah More is a proper noun, of the third person, singular number, feminine gender, and objective case.
A Proper Noun is the particular name of an individual+.
What is the distinction between a common and a proper noun?
No rule as to capitalizing has wider acceptance or better basis in principle than that an adjective derived from a proper noun should be capitalized, and “Roman” is such an adjective.
In the word “Reinoehl” (a proper noun), should the diphthong be used?
A Proper noun is the name of an individual; as, Charles, Ithaca, Ganges.
For example: boy is a common noun, because it is a name applied to all boys; but Charles is a proper noun, because it is the name of an individual boy.
Mississippi is a proper noun, because it is the name of an individual river; but river is a common noun, because it is the name of a species of things, and the name river is common to all rivers.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "proper noun" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.