Princess Hayu (Javanese: ꦲꦪꦸ) is fourth child and daughter of Sultan Hamengkubuwana X of Yogyakarta and his consort, Ratu Hemas. She is married to Prince Notonegoro, an executive in United Nations Development Programme Indonesia and a professional in the United Nations, New York, United States.
Princess Hayu was born in Yogyakarta on 24 December 1983. She is the fourth daughter of five siblings: 1. Princess Pembayun, 2. Princess Condrokirono, 3. Princess Maduretno, 4. Princess Hayu and 5. Princess Bendara. She spend her early childhood mostly in Yogyakarta. One of her particular interest when she was a child was game, mostly puzzles and Lego. In her adolescent days, she also enjoyed sports especially roller-skating. She competed on a national championship to represent her province in 1992 and won a gold medal.
Princess Hayu, attended junior high school in Australia for a year before returning to Indonesia. She then continued her studies at SMAN 3 Padmanaba Highschool Yogyakarta, a high school that was also attended by her husband Prince Notonegoro. After spending a year in Padmanaba Highschool, she moved to Singapore and went to the International School of Singapore.
Following her graduation from high school, Hayu decided to study Information Technology. She took a Computer Science Major at Stevens Institute of Technology, in the US, before moving to Bournemouth University in England to study Design and IT Project Management.
Hayu's marriage to Prince Notonegoro received heavy public attention since the engagement was announced on 20 June 2013 The couple had been dating for 10 years and knew each other from young age as their mothers are friends. Hayu's mother Ratu Hemas requested Noto to help her daughter when she started attending college in the US. Notonegoro who was pursuing a graduate study in the US at that time, met the princess in New York and the romance began there.