Seveners (Arabic:سبعية) were a branch of Ismā'īlīShīʻa. They became known as "Seveners" because they believe that Ismā'īl ibn Jaʻfar was the seventh and the last Imām (hereditary leader of the Muslim community in the direct line of ʻAlī ibn Abī Tālib). They believed his son, Muħammad ibn Ismā'īl al-Maktum, would return and bring about an age of justice as Mahdi. Their most famous and active branch were the Qarmatians.
Imamate of Seven Imams
Sometimes "sevener" is used to refer to Ismā'īlīs overall, though several branches, such as the Nizari Ismailis, have far more than seven imams.
Ismaili imams who were not accepted as legitimate by Seveners
The following Ismaili imams after Mahdi had been considered as heretics of dubious origins by certain Qarmatian groups who refused to acknowledge the imamate of the Fatimids and clung to their belief in the coming of the Mahdi.