Frau
From Tardis Wiki, the free Doctor Who reference
Frau was a German word for a woman. It could be used as a title in front of the name as in the case of Frau Tod and Frau Herz (AUDIO: The Beast of Orlok, A Shard of Ice). It could also be used in front of a title. Ingrid Karnstein was referred to as Frau Doktor. (PROSE: White Darkness)
The term continued to be used after Earth's destruction, as in the case of Frau Clovis. (TV: New Earth)