Ja'far ibn Yahya

Jaʽfar ibn Yahya Barmaki or Jafar al-Barmaki (767–803), also called Aba-Fadl, was a Bactrian vizier of the Abbasid caliph Harun al-Rashid, succeeding his father in that position. He was a member of the influential Barmakid family, formerly Buddhist leaders of the Nava Vihara monastery. He was executed in 803 at the orders of Harun al-Rashid.