Namesakes
Hungarian Kings and Queens:
5 kings
King István I 997-1038 
King István II 1114-1131
King István IV 1163
King István III 1161-1162; 1163-1172
King István V 1270-1272
Notable Actors and Actresses:
1 actor
Bill Skarsgård (a.k.a. Istvan) 1990-
Notable Athletes:
1 boxing
(boxing) István Kecskés 1980-
Notable Politicians and Statespeople:
1 politician
István Széchenyi 1791-1860
Olympic Medalists:
3 bronze, 3 gold, 3 silver, 2 silver/gold, 1 gold/bronze, 1 silver/bronze, 1 silver/gold/bronze
(silver) István Somodi 1908 high jump
(silver/gold) István Barta 1928; 1932 water polo
(silver/bronze) István Bárány 1928; 1932 swimming - 100 m freestyle; swimming - 4x200 m freestyle relay
(gold) István Molnár 1936 water polo
(silver/gold) István Szívós 1948; 1952; 1956 water polo
(gold) István Hasznos 1952 water polo
(gold/bronze) István Hevesi 1956; 1960 water polo
(bronze) István Rózsavölgyi 1960 1500 m
(silver) István Görgényi 1972 water polo
(silver/gold/bronze) István Szívós 1968; 1972; 1976; 1980 water polo
(silver) István Magas 1972 water polo
(bronze) István Kiss 1980 water polo
(bronze) István Udvardi 1980 water polo
(gold) István Gergely 2004; 2008 water polo
Saints:
1 saint
Saint Stephen I of Hungary (a.k.a. István) c. 975-1038