Namesakes
Hungarian Kings and Queens:
2 kings
King János I Zápolya 1526-1540 
King János II Zsigmond Zápolya 1540-1571
Hungarian Presidents and Prime Ministers:
5 prime ministers, 1 president
Prime Minister János Hadik 1918
Prime Minister Károly Huszár (a.k.a. János) 1919-1920
Prime Minister Pál Teleki (middle name János) 1920-1921; 1939-1941
Prime Minister János Kádár 1956-1958; 1961-1965
Prime Minister Gyula Horn (middle name János) 1994-1998
President János Áder 2012-2022
Notable Philosophers and Thinkers:
1 mathematician
John von Neumann (a.k.a. János) 1903-1957
Olympic Medalists:
1 bronze, 1 gold, 1 gold/bronze, 1 silver
(silver) Nándor Dáni (middle name János) 1896 800 m
(gold) János Németh 1932; 1936 water polo
(gold/bronze) János Konrád 1964; 1968 water polo
(bronze) János Steinmetz 1968 water polo