Banu Khazraj
One Banu Najjar group is mentioned in the Charter of Medina, and the Banu Najjar of Medina were the maternal clan of Muhammad's grandfather Abdul-Muttalib. Islamic historians like Ibn Hajar al-Asqalani and al-Tabari list them as a clan of the large Banu Khazraj tribe of Medina. Al-Asqalani states that their ancestor was Taymallah ibn Thalabah ibn Amr ibn al-Khazraj. The Banu Najjar had at least three sub-clans.