As for "Tumart," it is the nickname by which he remained famous and by which he was called over time by his sister in some narrations, or his mother as mentioned by the author of Al-Muqtabis, Ibn Khaldun. She said, "My mother rejoiced in him and was pleased. She said in the Western language: 'Atumart inwiski ayiwi,' meaning, 'Oh, my joy in you, my son.' She used to say this often. Also, when asked about her son when he was young, she would say in the Western language: 'Yak Tumart,' meaning, 'He has become joy and happiness.' Thus, the name Tumart prevailed, and he abandoned his supplication by the name of Abdullah, by which he was first named at his naming. However, Provançal rejected this interpretation, claiming that Tumart is the name of a woman, indicating a clear feminine form; it is the name of one of his grandmothers, which prevailed over his lineage. We do not know if this claim is supported by the characteristics of the Berber language. As for the nickname "Amghar" and "Sheikh," which is a translation of it, it seems that his people gave it to him. If what Ibn Khaldun said is true, that he was called "Amghar" in his childhood as an expression of respect, then it indicates respect for the family's origin, considering its religious status, as Ibn Khaldun himself described her as devout and devoted. The sources have not provided us with much information about this Sheikh and his circumstances. We learn from what is mentioned that he was poor, then his situation improved due to the gifts presented to him at the birth of his son Muhammad. However, it is feared that this might be the fabrication of some narrators to explain the blessing of the Mahdi and the nobility of his lineage. It seems that this father was very concerned about his son, as if he was expecting much from him after his journey to the East, which led him to "follow him to Bejaia while returning." He confirmed. The author of Al-Hullal Al-Mawshiyah mentioned that Abdullah was nicknamed Amghar, meaning "the light" in the Berber language, due to his lighting up the mosque. It seems that he confused this with "Asfu," attributed to Ibn Tumart himself.