Ratu Joni Madraiwiwi, Lord Madraiwiwi Tangatatonga (10 November 1957 – 29 September 2016) was a prominent Fijian lawyer, legal scholar, jurist, and politician. He served as vice-president, and also acting president, of Fiji, and Chief Justice of Nauru. A lifelong legal scholar, Madraiwiwi was a prolific writer and public speaker who authored several articles and books, including A Personal Perspective, his last book.