The South (Sudan) from the valley at that particular stage in antiquity was not clear enough to say it came in any period of history, whether it was in the pre-Christian or post-Christian eras. But it is certain that Arab migrations to Sudan have occurred since ancient times, and long before the Islamic conquest of Egypt. Hence the Arab migrations to Sudan, as I pointed out in the second chapter of this research, in the seventh century BC or the fifth. Therefore, when we talk about Arab tribes in Sudan after their migration from their original sources in the Arabian Peninsula and their settlement in the land of Sudan, it can be said that some researchers have divided the Arab tribes in Sudan into four main sections: 1 - The Ja'aliyyin: This group includes the tribes that inhabit the banks of the Nile River in the region located between Dongola and the north and the cataracts, where Khartoum is adjacent. They are of Adnani origin and are the most influential and numerous Arab tribes in Sudan. They trace their lineage to a single great ancestor named Ibrahim, who was nicknamed Al-Ja'ali. Historical accounts attribute him to Sa'id bin Fadl bin Abdullah bin Al-Abbas, the uncle of the Messenger, may God's prayers and peace be upon him. For this reason, they are sometimes called the Abbasid group. It is not impossible that these Ja'aliyyin are a mixture of several tribes truly belonging to Adnan, but not tracing back to a single common ancestor. Rather, they are united in one region, purpose, and goal. They may also be linked by marriage ties. Therefore, we do not accept the idea of tracing lineage to a single ancestor, because the issue of Arab lineage has been subject to falsification since the second Hijri century. Hence, the ancestor Ibrahim may exist, but not for all branches, sub-branches, and clans. This is because this leader, in order to gain strength, control, and influence, deliberately included those who were not of his lineage in his tribe, saying to the people of the land, "We have made you one of us."