John P. Marquand vs John Philip Marquand

John P. Marquand and John Philip Marquand both are nouns.

Word	Noun	Adjective	Verb	Adverb
John P. Marquand	Yes	No	No	No
John Philip Marquand	Yes	No	No	No

As nouns, John P. Marquand and John Philip Marquand are synonyms defined as:

John P. Marquand and John Philip Marquand: United States writer who created the Japanese detective Mr. Moto and wrote other novels as well (1893-1960)

Other synonyms of John P. Marquand include John Marquand, Marquand.

John P. Marquand (noun)	John Philip Marquand (noun)
United States writer who created the Japanese detective Mr. Moto and wrote other novels as well (1893-1960)	United States writer who created the Japanese detective Mr. Moto and wrote other novels as well (1893-1960)