Zdeněk Koubek

Zdeněk Koubek (1913 to 1986), born Zdena Koubková, was a track athlete from Czechoslovakia. He won two medals at the 1934 Women's World Games and several national titles in the 100 to 800 metre running events, the long jump and the high jump, and set a few world records in running events that were later revoked. Born intersex, with contradictory reports of his specific condition, he was raised as a girl. Koubek came out as a man when he retired from athletics in 1935 and later had gender-affirming surgery, and his transition is among the earliest recorded gender transitions in athletics at the international level.