The book "Clarify the suspect in controlling the names of the narrators, their lineages and their titles and their" by Imam Muhammad bin Abdullah Al -Qaisi Al -Dimashqi Al -Shafi'i, known as Ibn Nasir al -Din, is one of the most important books composed on a topic, which was on the adoption of most of the scholars who came after him in controlling the names of the narrators Distinguishing suspects in names and nicknames and titles from each other.