ZM: Yes, Victor Ahn is a ROK-born Russian short track speed skating athlete. He represented the Republic of Korea at the 2006 Turin Winter Olympics winning three gold medals and a bronze medal, becoming the most successful athlete in the Republic of Korea.
K: I read that after many years competing for the Republic of Korea, Viktor Ahn became a Russian citizen and repeated his 2006 performance when he again won three gold medals and one bronze medal in the 2014 Winter Olympics held in Sochi, Russia.