Abbasa bint al-Mahdi was a famous Abbasid princess. She was the daughter of Abbasid caliph al-Mahdi, sister of caliph Musa al-Hadi and Harun al-Rashid. Wikipedia
Born: 777 AD, Baghdad, Iraq
Died: 825 AD (age 48 years), Baghdad, Iraq
Siblings: Harun al-Rashid
Partner: Musa ibn Isa ibn Musa al-Hashimi
Parents: al-Mahdi
Grandparents: al-Mansur and Arwa bint Mansur al-Himyari