Robertson vs Oscar Robertson

Robertson and Oscar Robertson both are nouns.

Word	Noun	Adjective	Verb	Adverb
Robertson	Yes	No	No	No
Oscar Robertson	Yes	No	No	No

As nouns, Robertson and Oscar Robertson are synonyms defined as:

Robertson and Oscar Robertson: United States basketball guard (born in 1938)

Other synonyms of Robertson include Oscar Palmer Robertson.

Robertson (noun)	Oscar Robertson (noun)
United States basketball guard (born in 1938)	United States basketball guard (born in 1938)