Johann Dietrich Alfken (11 June 1862, Frankfurt - 14 February 1945, Rüthersdorf, Berlin)was a German entomologist who specialised in Hymenoptera especially Apoidea.
Johann Sebastian Bach | Johann Wolfgang von Goethe | Marlene Dietrich | Johann Strauss II | Dietrich Fischer-Dieskau | St. Johann in Tirol | Dietrich Bonhoeffer | Johann Heinrich Pestalozzi | Johann Albert Fabricius | Johann Christian Bach | Johann Georg Wagler | Hans-Dietrich Genscher | Johann Pachelbel | Johann Nepomuk Hummel | Johann Gottfried Herder | Johann Nestroy | Johann Joachim Winckelmann | Johann Gottlieb Fichte | Johann Bernhard Fischer von Erlach | Johann Homann | Johann Friedrich Böttger | Johann Kuhnau | Johann Heinrich Lambert | Johann Friedrich Blumenbach | Johann Wilhelm von Müller | Johann Wilhelm, Elector Palatine | Johann Mattheson | Johann Jakob Engel | Johann Gustav Droysen | Johann Gottfried Schadow |