Abu Nasr Qara Yusuf ibn Mohammad Barani[1] (Azerbaijani: Qara Yusif قارا یوسف; c. 1356 – 1420) was the ruler of the Qara Qoyunlu dynasty[2] (or "Black Sheep Turkomans") from c.1388 to 1420, although his reign was interrupted by Tamerlane's invasion (1400–1405). He was the son of Qara Mahammad Töremish, a brother-in-law to Ahmad Jalayir.[3]