Audrey Hepburn vs Hepburn

Audrey Hepburn and Hepburn both are nouns.

Word	Noun	Adjective	Verb	Adverb
Audrey Hepburn	Yes	No	No	No
Hepburn	Yes	No	No	No

As nouns, Audrey Hepburn and Hepburn are synonyms defined as:

Audrey Hepburn and Hepburn: United States film actress who appeared in many films with Spencer Tracy (1907-2003)

Other synonyms of Audrey Hepburn include Katharine Hepburn, Katharine Houghton Hepburn.

Audrey Hepburn (noun)	Hepburn (noun)
United States film actress who appeared in many films with Spencer Tracy (1907-2003)	United States film actress who appeared in many films with Spencer Tracy (1907-2003)