Namesakes
Dutch Prime Ministers:
2 prime ministers
Jan Kappeyne van de Coppello 1877-1879 
Joop den Uyl (a.k.a. Johannes) 1973-1977
Finnish Presidents and Prime Ministers:
2 prime ministers
(prime minister) V. J. Sukselainen (middle name Johannes) 1957; 1959-1961
(prime minister) Johannes Virolainen 1964-1966
German Chancellors and Presidents:
1 president
(president) Johannes Rau 1999-2004
Nobel Prize Winners:
4 physics, 1 literature, 1 medicine
(physics) Johannes Diderik van der Waals 1910
(physics) Johannes Stark 1919
(medicine) Johannes Fibiger 1926
(literature) Johannes V. Jensen 1944
(physics) J. Hans D. Jensen (a.k.a. Johannes) 1963
(physics) Georg Bednorz (a.k.a. Johannes) 1987
Notable Actors and Entertainers:
4 actors, 1 magician, 1 presenter
Johannes Heesters 1903-2011
Chiem van Houweninge (middle name Johannes) 1940-
Peer Mascini (middle name Johannes) 1941-2019
Thomas Gottschalk (middle name Johannes) 1950-
Hans Klok 1969-
Patrick J. Adams (middle name Johannes) 1981-
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:
7 soccer, 2 cricket, 1 driving, 1 ice hockey, 1 rugby, 1 track
(track) Paavo Nurmi (middle name Johannes) 1897-1973
(soccer) Kick Smit (a.k.a. Johannes) 1911-1974
(soccer) Willy van der Kuijlen (middle name Johannes) 1946-2021
(soccer) Jan Peters 1954-
(ice hockey) Petri Varis (middle name Johannes) 1969-
(cricket) Hansie Cronje 1969-2002
(driving) Jos Verstappen 1972-
(cricket) Albie Morkel (a.k.a. Johannes) 1981-
(soccer) Paul Verhaegh (middle name Johannes) 1983-
(soccer) Stijn Schaars (middle name Johannes) 1984-
(rugby) Duane Vermeulen (middle name Johannes) 1986-
(soccer) Kevin Strootman (middle name Johannes) 1990-
(soccer) Joey Veerman (a.k.a. Johannes) 1998-
Notable Businesspeople:
1 businessperson
Joop van den Ende 1942-
Notable Filmmakers:
1 screenwriter
Chiem van Houweninge (middle name Johannes) 1940-
Notable Musicians:
3 singers, 1 composer
Johannes Brahms 1833-1897
Johannes Heesters 1903-2011
George Baker (a.k.a. Johannes) 1944-
Helmut Lotti (middle name Johannes) 1969-
Notable Politicians and Statespeople:
9 politicians
Johan Witteveen 1921-2019
Frans Andriessen (middle name Johannes) 1929-2019
Hans Gruijters 1931-2005
Jan Pronk 1940-
Jozias van Aartsen (middle name Johannes) 1947-
Johan Remkes 1951-
Jan Marijnissen 1952-
Marthinus van Schalkwyk (middle name Johannes) 1959-
Bruno Bruins (middle name Johannes) 1963-
Notable Scientists and Inventors:
4 physicists, 2 astronomers, 1 inventor
Johannes Gutenberg c. 1395-1468
Johannes Kepler 1571-1630
Johannes Hevelius 1611-1687
Johannes Diderik van der Waals 1837-1923
Johannes Stark 1874-1957
J. Hans D. Jensen (a.k.a. Johannes) 1907-1973
Georg Bednorz (a.k.a. Johannes) 1950-
Notable Writers:
2 authors, 1 author/poet
Johannes V. Jensen 1873-1950
Martin Walser (middle name Johannes) 1927-2023
Joost Zwagerman (a.k.a. Johannes) 1963-2015
Olympic Medalists:
6 silver, 4 bronze, 1 bronze/gold/silver, 1 gold, 1 silver/gold, 1 silver/gold/bronze
(bronze) Johannes Drost 1900 swimming
(silver) Jalmari Eskola (middle name Johannes) 1912 cross country team
(gold) Jo van Gastel 1920 archery - moving target 28 m, team
(silver) Henry Dafel (middle name Johannes) 1920 4x400 m relay
(silver/gold) Paavo Nurmi (middle name Johannes) 1920; 1924; 1928 10000 m; team cross country; 1500 m; 3000 m team; 5000 m; individual cross country; 3000 m steeplechase
(bronze) Lauri Virtanen (middle name Johannes) 1932 10000 m; 5000 m
(silver) Akilles Järvinen (middle name Johannes) 1928; 1932 decathlon
(silver) Teuvo Laukkanen (middle name Johannes) 1948 cross-country skiing
(bronze) Piet Salomons (middle name Johannes) 1948 water polo
(bronze) Joop Rohner 1948 water polo
(silver) Eero Kolehmainen (middle name Johannes) 1952 cross-country skiing
(bronze/gold/silver) Veikko Hakulinen (middle name Johannes) 1952; 1956; 1960 cross-country skiing
(silver) Johannes Kaiser 1960 4x400 m relay
(silver/gold/bronze) Bob de Jong (middle name Johannes) 1998; 2006; 2010; 2014 speed skating
Other Leaders:
1 president, 1 prime minister
Prime Minister Jan Buiskool (a.k.a. Johannes) 1951-1952 Suriname
President Johan Kraag (a.k.a. Johannes) 1990-1991 Suriname
Other Royalty:
3 princes
Aloys I, Prince of Liechtenstein (middle name Johannes) 1781-1805 Liechtenstein
Franz Joseph II, Prince of Liechtenstein (middle name 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 blessed, 1 saint
Saint John Scotus (a.k.a. Johannes) ?-1066
Blessed Valentinus Paquay (a.k.a. Johannes) 1828-1905
Swedish Prime Ministers:
1 prime minister
Rickard Sandler (middle name Johannes) 1925-1926
Swiss Presidents:
1 president
Johannes Baumann 1938