Edward Kennedy Ellington vs Ellington

Edward Kennedy Ellington and Ellington both are nouns.

Word	Noun	Adjective	Verb	Adverb
Edward Kennedy Ellington	Yes	No	No	No
Ellington	Yes	No	No	No

As nouns, Edward Kennedy Ellington and Ellington are synonyms defined as:

Edward Kennedy Ellington and Ellington: United States jazz composer and piano player and bandleader (1899-1974)

Other synonyms of Edward Kennedy Ellington include Duke Ellington.

Edward Kennedy Ellington (noun)	Ellington (noun)
United States jazz composer and piano player and bandleader (1899-1974)	United States jazz composer and piano player and bandleader (1899-1974)