Wagner vs Otto Wagner

Wagner and Otto Wagner both are nouns.

Word	Noun	Adjective	Verb	Adverb
Wagner	Yes	No	No	No
Otto Wagner	Yes	No	No	No

As nouns, Wagner and Otto Wagner are synonyms defined as:

Wagner and Otto Wagner: Austrian architect and pioneer of modern architecture (1841-1918)

Wagner (noun)	Otto Wagner (noun)
the music of Wagner	Austrian architect and pioneer of modern architecture (1841-1918)
German composer of operas and inventor of the musical drama in which drama and spectacle and music are fused (1813-1883)
Austrian architect and pioneer of modern architecture (1841-1918)