Joannes Gennadius

Joannes Gennadius
Gennadius in 1914
BornἸωάννης Γεννάδιος
(1844-01-07)7 January 1844
Athens, Greece
Died7 September 1932(1932-09-07) (aged 88)
London, England
OccupationDiplomat, bibliophile, writer
NationalityGreek
SpouseFlorence Laing Kennedy (1853–1952)

Joannes, Ioannes or John Gennadius (Greek: Ἰωάννης Γεννάδιος, 1844–1932) was a Greek diplomat, writer, and speaker, best known for his donation of his collection of Greek books and art to the Gennadius Library.