Katchka Nakhova
From Tardis Wiki, the free Doctor Who reference
Katchka Nakhova, or Katya, was an 18th century prostitute. She worked at Scarlette's brothel on Henrietta Street. It was popularly believed that she was a Russian spy representing the Ereticy. She was killed by a homicidal client on September 1783. (PROSE: The Adventuress of Henrietta Street)