First to win 4 medals at different olympic games?

Answer 1

The first athletes to win 4 or more medals at two Olympic Games were archer Hubert van Innis of Belgium and shooter Carl Osburn of the United States. Both accomplished the feat at the 1920 Games in Antwerp.

1) Hubert van Innis - won 4 medals (2 gold, 2 silver) at the 1900 Games in Paris and won 6 medals (4 gold, 2 silver) at the 1920 Games in Antwerp.
2) Carl Osburn - won 4 medals (1 gold, 2 silver, 1 bronze) at the 1912 Games in Stockholm and won 6 medals (4 gold, 1 silver, 1 bronze) at the 1920 Games in Antwerp.