Proper noun - AshokBhat/grammar GitHub Wiki
About
A '''proper noun''' or '''proper name''' is a noun representing a unique thing (such as ''London'', ''Jupiter'', ''John Hunter'', or ''Toyota''), as opposed to a '''common noun''', which represents a class of things (for example, ''city'', ''planet'', ''person'' or ''corporation'').
Proper nouns are the only nouns in English which have the first letter capitalized.
In English, proper nouns are not normally preceded by an article or other limiting modifier (such as ''any'' or ''some''), and are used to denote a particular person, place, or object without regard to any descriptive meaning the word or phrase may have (for example, a town called "Newtown" may be, but does not necessarily have to be, a new recently built town).