Joannes, Ioannes or John Gennadius (Ιωάννης 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.
Ο Ιωάννης Γεννάδιος (1844 - 1932) ήταν Έλληνας προξενικός υπάλληλος με συγγραφική δραστηριότητα και ευεργέτης. (el)
Joannes, Ioannes or John Gennadius (Ιωάννης 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. (en)