Al-Laiyth Ibn-Saad was born in Cairo, his family was originally from Isfahan (now in Iran). He was taught in Egypt by prominent scholars and orators and then he traveled to other countries to study under the supervision of Iraqi and Hijazi sheikhs. According to the historical sources, he was a wealthy person.
Dhul Noon Al-Masry was born in Akhmim in Upper Egypt. He performed the Hadith, narrating them. He is considered to be one of the major figures among Sufi Muslims. He put many of the rules of Sufism into the form in which we now know them. People in Egypt disapproved of his statements, saying that he had invented a science that the Companions of the Prophet never spoke of. Some of his enemies informed on him to the Caliph Al-Mutawakkel, who accused him of heresy. He summoned him from Egypt. When he came to Al-Mutawakkel and preached to him, the caliph wept, and sent him back dignified to Egypt.
Bakkar is considered to have been one of the greatest judges in the history of Islamic Egypt. He was related to Al-Hareth Ibn-Kelda, one of the companions of the Prophet Mohammad, peace be upon him. Ahmad Ibn-Tulun, the ruler of Egypt during the time of Judge Bakkar, attended his councils to entertain himself with the Judge's knowledge of the doctrine.
Yunus Ibn Abdel A'ala Al-Sadafi Al-Faqeeh, was one of the companions of Imam Al-Shafii. He narrated much about Al-Shafii and accompanied him. Yunus learned reading from Warsh and other great readers of his period, so that Mawwas Ibn Sahl, Mohammad Ibn Garir Al-Tabari and others quoted him. He was a splendid spokesman, who was taught by Al-Shafii and learned from him the Hadith and the Doctrine, which he narrated to his audiences.