He is Abdul-Malek ibn Abdullah ibn Yusouf ibn Muhammad Al-Juwaini An-Naisabouri. His title is Imam Al-Harameen and his nickname is Abul-Ma’ali. He was born in month of Muharram in 419 AH. according to the most correct opinion. He wrote lots of books in different fields of knowledge. He died in 25th Rabee’ Al-Akher month 478 AH.