Jack William Nicklaus vs Jack Nicklaus

Jack William Nicklaus and Jack Nicklaus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Jack William Nicklaus	Yes	No	No	No
Jack Nicklaus	Yes	No	No	No

As nouns, Jack William Nicklaus and Jack Nicklaus are synonyms defined as:

Jack William Nicklaus and Jack Nicklaus: United States golfer considered by many to be the greatest golfer of all time (born in 1940)

Other synonyms of Jack William Nicklaus include Nicklaus.

Jack William Nicklaus (noun)	Jack Nicklaus (noun)
United States golfer considered by many to be the greatest golfer of all time (born in 1940)	United States golfer considered by many to be the greatest golfer of all time (born in 1940)