Abu Yusuf
| Abu Yusuf | |
|---|---|
| Title | Head Student of Imam Abu Hanifa | 
| Personal life | |
| Born | 729 | 
| Died | 798 (aged 59–60) | 
| Nationality | Caliphate | 
| Era | Islamic Golden Age | 
| Region | Iraq | 
| Main interest(s) | Islamic Jurisprudence | 
| Notable idea(s) | Evolution of Islamic Jurisprudence | 
| Religious life | |
| Religion | Islam | 
| Denomination | Sunni | 
| Jurisprudence | Hanafi | 
| Muslim leader | |
| Influenced by | |
Ya'qub ibn Ibrahim al-Ansari (Arabic: يعقوب بن إبراهيم الأنصاري, romanized: Yaʿqūb ibn Ibrāhīm al-Anṣārī), better known as Abu Yusuf (Arabic: أبو يوسف, romanized: Abū Yūsuf) (729–798) was an Islamic jurist, as well as a student of Abu Hanifa (d.767) and Malik ibn Anas (d.795), who helped spread the influence of the Hanafi school of Islamic law, and was notable for having introduced the Maliki-like position of Urf being a valid source of sunnah, that could overrule literary traditions.