Tera de Marez Oyens (born august 5, 1932- died august 29, 1996) was a Dutch composer. She was born as Woltera Gerharda Wansink and she
studied at the conservatory of Amsterdam. She composed church music and avant-garde pieces, regularly involving electronics. She wrote over 200
compositions, of which about 17 are available on cd. She married three times, with Gerrit de Marez Oyens, Menachem Arnoni and, a few months
before she died, Dutch comic artist Marten Toonder.