Abu Yusuf

Yaʿqūb ibn Ibrāhīm al-Anṣārī, commonly known as Abū Yūsuf, was a prominent Muslim jurist and one of the foremost authorities of the early Hanafi school of Islamic law. He was the leading student of Abu Hanifa and played a decisive role in consolidating, systematizing, and spreading Hanafi jurisprudence throughout the Abbasid Caliphate.