علي بن موسى الرضا
He was born to his father, Ali al-Ridha and a mother whose name and background is not entirely known. According to Madelung, she was an slave girl from Nubia, called Sabika(or Ḵayzarān) and was from the family of Maria al-Qibtiyya, who was the slave mother of Muhammad's young son Ibrahim. Her original name, is said to be Durra, who was called al-Khayzuran, by Ali al-Ridha.