Namesakes for Johannes

Finnish Presidents and Prime Ministers: 2 prime ministers
      (prime minister) V. J. Sukselainen (a.k.a. Johannes)   1957; 1959-1961  
      (prime minister) Johannes Virolainen   1964-1966  
German Chancellors and Presidents: 1 president
      (president) Johannes Rau   1999-2004  
Nobel Prize Winners: 3 physics, 1 literature, 1 medicine
      (physics) Johannes Diderik van der Waals   1910  
      (physics) Johannes Stark   1919  
      (medicine) Johannes Fibiger   1926  
      (literature) Johannes Vilhelm Jensen   1944  
      (physics) Georg Bednorz (a.k.a. Johannes)   1987  
Notable Artists: 2 painters, 1 cartoonist
      Jan van Eyck (a.k.a. Johannes)   c. 1395-1441  
      Jan Vermeer (a.k.a. Johannes)   1632-1675  
      Jan Kruis (a.k.a. Johannes)   1933-2017  
Notable Athletes: 4 cricket, 2 soccer, 1 ice hockey, 1 rugby
      (rugby) Kobus Wiese (a.k.a. Johannes)   1964-  
      (ice hockey) Petri Varis (a.k.a. Johannes)   1969-  
      (cricket) Hansie Cronje (a.k.a. Johannes)   1969-2002  
      (cricket) Albie Morkel (a.k.a. Johannes)   1981-  
      (cricket) Jan-Berrie Burger (a.k.a. Johannes)   1981-  
      (soccer) Paul Verhaegh (a.k.a. Johannes)   1983-  
      (soccer) Stijn Schaars (a.k.a. Johannes)   1984-  
      (cricket) Henno Jordaan (a.k.a. Johannes)   1988-  
Notable Musicians: 1 composer
      Johannes Brahms   1833-1897    
Notable Scientists and Inventors: 2 physicists, 1 inventor
      Johannes Gutenberg   c. 1395-1468  
      Johannes Kepler   1571-1630  
      Johannes Diderik van der Waals   1837-1923  
Olympic Medalists: 4 silver, 3 bronze, 1 gold, 1 gold/bronze/silver, 1 silver/gold/bronze
      (bronze) Johannes Drost   1900   swimming  
      (gold) Jo van Gastel (a.k.a. Johannes)   1920   archery - moving target 28 m, team  
      (silver) Akilles Järvinen (a.k.a. Johannes)   1928; 1932   decathlon  
      (silver) Teuvo Laukkanen (a.k.a. Johannes)   1948   cross-country skiing  
      (bronze) Pieter Salomons (a.k.a. Johannes)   1948   water polo  
      (bronze) Joop Rohner (a.k.a. Johannes)   1948   water polo  
      (silver) Eero Kolehmainen (a.k.a. Johannes)   1952   cross-country skiing  
      (gold/bronze/silver) Veikko Hakulinen (a.k.a. Johannes)   1952; 1956; 1960   cross-country skiing  
      (silver) Johannes Kaiser   1960   4x400 m relay  
      (silver/gold/bronze) Bob de Jong (a.k.a. Johannes)   1998; 2006; 2010; 2014   speed skating  
Other Royalty: 3 princes
      Aloys I, Prince of Liechtenstein (a.k.a. Johannes)   1781-1805   Liechtenstein  
      Franz Joseph II, Prince of Liechtenstein (a.k.a. Johannes)   1938-1989   Liechtenstein  
      Hans-Adam II, Prince of Liechtenstein (a.k.a. Johannes)   1989-   Liechtenstein  
Roman and Byzantine Emperors: 8 emperors
      Emperor Johannes Tzimisces   969-976  
      Emperor Johannes Comnenus   1118-1143  
      Emperor Johannes Ducas Vatatzes   1221-1254  
      Emperor Johannes Ducas Lascaris   1258-1261  
      Emperor Johannes Cantacuzenus   1341-1354  
      Emperor Johannes Palaeologus   1341-1376  
      Emperor Johannes Palaeologus   1390  
      Emperor Johannes Palaeologus   1425-1448  
Saints: 1 saint
      Saint John Scotus (a.k.a. Johannes)   ?-1066  
Swedish Prime Ministers: 1 prime minister
      Rickard Sandler (a.k.a. Johannes)   1925-1926