Maria Friderike Radner (German: [ˈʁaːdnɐ]; 7 May 1981 – 24 March 2015) was a German contralto who performed internationally in opera and in concerts.Radner studied at the Robert Schumann Hochschule in Düsseldorf, Germany. Both Stern magazine and Munich's Abendzeitung described her as an "extremely talented interpreter of Wagner's music".