Adolf Hitler | Adolf Eichmann | John Engler | Emil Adolf von Behring | Adolf Schwarz | Adolf Hurwitz | Adolf von Harnack | Adolf Seilacher | Adolf Loos | Adolf | Gustaf VI Adolf of Sweden | Adolf Galland | Adolf Anderssen | Petter Adolf Karsten | Hans Adolf Krebs | Gustav IV Adolf of Sweden | Gustav Adolf Grammar School | Engler | Adolf Muschg | Adolf Klose | Adolf Just | Adolf Jellinek | Adolf Erik Nordenskiöld | Adolf, Duke of Holstein-Gottorp | Adolf Bernhard Marx | Richard Adolf Zsigmondy | King Gustav Adolf's Gymnasium | Johan Adolf Pengel International Airport | Friedrich Adolf Riedesel | Carl Jakob Adolf Christian Gerhardt |
Among his many contributions to taxonomy are his treatments of the Medusagynaceae, Theaceae, Violaceae, and Canellaceae for the second edition of the Die Natürlichen Pflanzenfamilien of Engler & K. Prantl, the publication as editor with E. Werdermann, of ed.
Reinhard Gustav Paul Knuth (1874–1957) was a German taxonomist, botanist and pteridologist responsible for "Initia florae venezuelensis" in 1928, and numerous contributions to Adolf Engler's "Das Pflanzenreich" on Geraniaceae, Oxalidaceae, Lecythidaceae, and other families.