Yes, they all are
David Johnson is a proper noun; all persons names are proper nouns; all proper nouns are capitalized.
yes, all names are proper nouns
Yes all proper nouns are considered concrete nouns.
Amy is a name All names are 'proper nouns'.
Yes the word Eric is a noun. All names are proper nouns.
Yes. Jason is a name and all names are known as "proper nouns".
All proper nouns should be capitalized but all words are capitalized at the beginning of the sentence.
Yes because it is the name of the library. All proper nouns are names.
The proper nouns Courtland, Cortland, and Cortlandt are all surnames and place names.
Yes, Ohio is a noun. All state names are proper nouns.
The word Islam is a proper noun, it is the name of a specific religion. Names for all religions are proper nouns.
The names of religions are proper nouns, so they always begin with a capital.