Sir John Gielgud vs Arthur John Gielgud

Sir John Gielgud and Arthur John Gielgud both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sir John Gielgud	Yes	No	No	No
Arthur John Gielgud	Yes	No	No	No

As nouns, Sir John Gielgud and Arthur John Gielgud are synonyms defined as:

Sir John Gielgud and Arthur John Gielgud: English actor of Shakespearean roles who was also noted for appearances in films (1904-2000)

Other synonyms of Sir John Gielgud include Gielgud.

Sir John Gielgud (noun)	Arthur John Gielgud (noun)
English actor of Shakespearean roles who was also noted for appearances in films (1904-2000)	English actor of Shakespearean roles who was also noted for appearances in films (1904-2000)