Maduretno was born Gusti Raden Ajeng Nurkamnari Dewi on 12 April 1978 in Yogyakarta, Indonesia, to
Sultan Hamengkubuwono X and
Ratu Hemas. Nurkamnari Dewi spent her early childhood in the Madukismo Sugar and Spirit Distillery housing complex in Kasihan, Bantul. Because of her parents' royal and political duties, the family moved from Kaliurang in Pakem, Sleman to that housing area in the late 1970s to early 1980s together with other members of the royal household. After roughly a decade in Madukismo, the family moved to the Keraton Yogyakarta in February 1988. Her father, KGPH Mangkubumi, was the eldest son of Hamengkubuwana IX and was regarded as the principal heir to the succession of the Sultanate of Yogyakarta. In 1989, following his grandfather's death, her father was installed as Hamengkubuwana X and her mother became the consort. After their parents' installation, she and her sisters took up full-time residence at the Keraton Ngayogyakarta Hadiningrat. Nurkamnari Dewi was raised in the Special Region of Yogyakarta through lower secondary school. She attended SMP Stella Duce Yogyakarta. After graduating, her parents supported her to continue her education in Australia. She completed secondary education at Indooroopilly State High School (ISHS) in Brisbane, Queensland, then remained in Brisbane to study hospitality at TAFE Queensland, before undertaking food and beverage studies at Holmesglen Institute of TAFE (Glen Waverley campus) in Melbourne, Victoria.{{cite web ==Personal life==