István Antal Szívós, also known as István Szívós Jr. was a Hungarian water polo player. He competed in four consecutive Olympics in 1968–1980 and won a medal in each of them, becoming one of eight male athletes who won four or more Olympic medals in water polo. He also won six gold or silver medals at world and European championships and nine national titles. Between 1966 and 1980 he played 308 international matches for Hungary. In 1996 he was inducted to the International Swimming Hall of Fame, one year earlier than his father István Sr., who won Olympic gold medals in water polo in 1952 and 1956.

Márton Szivós is a Hungarian water polo player. He is part of the national team since 2003 and competed at the 2012 and 2016 Olympics. He is a son of István Szívós, Jr. and a grandson of István Szívós, both of whom won Olympic gold medals in water polo.