Madeleine Issigri was the daughter of Dom Issigri.
Madeleine became head of the Issigri Mining Company after her father disappeared. She later learned that he had been kidnapped by Maurice Caven, who blackmailed her into allowing him to set up a base on Ta. She eventually turned against the pirate, helped the Second Doctor defeat him, and was reunited with her father. (TV: The Space Pirates)