Wu Han's sister

Wu Han's sister was a Chinese-Dutch woman who was the sister of Wu Han and the daughter of Wu Han's parents. Prior or around 1933, this woman and her family, sans her brother, contracted an outbreak of influenza and died, leading Wu Han to study political science.

Behind the scenes
James Kahn's novelization of Indiana Jones and the Temple of Doom states that following Wu Han's death, Indy would send money to his family, but as Indiana Jones and the Dinosaur Eggs revealed, Wu Han's family, including his sister, had all died by that point. Wheter Wu Han had more relatives or this has been retconned has yet to be established by Lucasfilm Ltd.

Appearances

 * Indiana Jones and the Dinosaur Eggs