Otakar à  kvajn (3 June 1894 â 12 September 1941) was a Czech footballer. He competed for Czechoslovakia in the men's tournament at the 1920 Summer Olympics.
On a club level, he played for SK Kladno, SK à ½idenice, Moravská Slavia Brno, SK Slavia Prague and AC Sparta Prague.
He was forced to end his active career at the age of 26 due to the knee injury. Afterwards, à  kvajn began to work as a football manager, coaching i.a. SK ProstÃÂjov, SK Kladno, Pogoà  Lwów and Wisà Âa Kraków.