Maria Auxiliadora Villar Castanheira

Dora Castanheira (born 14 March 1960) is a Brazilian volleyball player. She competed at the 1980 Summer Olympics and the 1988 Summer Olympics.

With her distinctive voice, she recorded the Rio Metro's sound system, indicating the stations providing access to the beach volleyball arena in Copacabana and other announcements, during the 2016 Summer Olympics in Rio. One of the announcements was the following: "Eu sou a Dora castanheira, atleta Olímpica do vôlei. Bem-vindos ao palco dos Jogos Olímpicos Rio 2016. Próxima estação: Maracanã" (" I am Dora Castanheira, Olympic volleyball athlete. Welcome to the stage of the Rio 2016 Olympic Games. Next stop: Maracanã.")