AD-DARAQUTNI, ‘Ali bin Umar:
Abul-Hasan, ‘Ali bin ‘Umar bin Ahmad bin Mahdi Al-Baghdadi. He was nicknamed after a big store called Dar Al-Qutn in Baghdad. He was a great Hafidh and a unique Imam who was born in the year 306 H. He was the authority in the methodology of Hadeeth, the knowledge of the weaknesses of the Hadeeth narrations and names of the Hadeeth narrators of his time. Ad-Daraqutni died on 8th Dhul-Qa’da 385 H.