Olga Eunice Miller (née Wondunna, later Reeves; 27 March 1920 – August 2003), often known as Aunty (or Auntie) Olga or by her traditional name Wandi, was an Australian historian, artist, author and Aboriginal elder of the Butchulla people. She often acted as an advocate for K'gari (Fraser Island) and Butchulla issues, and illustrated The Legends of Moonie Jarl, the first known Australian Aboriginal–written children's book to be published. In 2002 she was named a Queensland Great.