Late 18th century; earliest use found in Vicesimus Knox (1752–1821), headmaster and writer. From ancient Greek πώγων beard + -ologist, perhaps after French pogonologiepogonology.
Definition of pogonologist in US English:
pogonologist
nounˌpəʊɡəˈnɒlədʒɪst
rare
A person who studies or writes about beards.
Origin
Late 18th century; earliest use found in Vicesimus Knox (1752–1821), headmaster and writer. From ancient Greek πώγων beard + -ologist, perhaps after French pogonologie pogonology.