Matilda (The Impossible Astronaut)

Matilda was an aristocrat who once met the Eleventh Doctor. She painted a nude study of him. When King Charles II came looking for him, he hid beneath her skirts. The king discovered the Doctor and imprisoned him in the Tower of London. (TV: The Impossible Astronaut)

Behind the scenes
Matilda is not named in the episode proper. The name is taken from the end credits.