Name: Yaqub ibn Ishaq ibn Ziyad

Fame: Yaqub ibn Ishaq al-Qalusi

Kuniya: Abu Yusuf

Lineage: al-Basri, al-Baghdadi

Occupation: al-Qalusi, the Judge

Rank: Trustworthy Haafiz

Lived in: Basra, Baghdad, Nusaybin

Died in: Nusaybin

Died Year: 271

Abu Hatim ibn Hibban al-Busti: He mentioned him in al-Thiqat and said: He narrated from Abu Asim and the Basrans, his son Musaddad narrated from him

al-Khatib al-Baghdadi: A حافظ (protector) who is trustworthy and precise

al-Dhahabi: He wrote his biography in al-Miqni