Dr. vs E. A. von Willebrand

Dr. and E. A. von Willebrand both are nouns.

Word	Noun	Adjective	Verb	Adverb
Dr.	Yes	No	No	No
E. A. von Willebrand	Yes	No	No	No

Dr. (noun)	E. A. von Willebrand (noun)
a licensed medical practitioner	Finnish physician who first described vascular hemophilia (1870-1949)
a person who holds Ph.D. degree (or the equivalent) from an academic institution