Abu'l-Qasim Jafar (Persian: ابوالقاسم جعفر), was an Iranian statesman from the Fasanjas family who served the Buyid dynasty.
He was the son of Abu'l-Faraj Muhammad, and was appointed in 1012 by the Buyid ruler Sultan al-Dawla as his vizier. Abu'l Qasim Jafar later died in 1029. He has a son known as Dhu'l-Sa'adat, who continued to occupy high offices under the Buyids.
References
Abu'l-Qasim Jafar Wikipedia(Text) CC BY-SA