Sir Jacob Epstein vs Epstein

Sir Jacob Epstein and Epstein both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sir Jacob Epstein	Yes	No	No	No
Epstein	Yes	No	No	No

As nouns, Sir Jacob Epstein and Epstein are synonyms defined as:

Sir Jacob Epstein and Epstein: British sculptor (born in the United States) noted for busts and large controversial works (1880-1959)

Other synonyms of Sir Jacob Epstein include Jacob Epstein.

Sir Jacob Epstein (noun)	Epstein (noun)
British sculptor (born in the United States) noted for busts and large controversial works (1880-1959)	British sculptor (born in the United States) noted for busts and large controversial works (1880-1959)