Zaydiyya

Zaidiyyah or Zaidism (Arabic: الزيدية‎ az-zaydiyya, adjective form Zaidi or Zaydi; occasionally known as Fivers) is one of the Shia sects closest in terms of theology to the Ibadhi and Mutazila schools. Zaidis are named after Zayd ibn ʻAlī, the grandson of Husayn ibn ʻAlī and the son of their fourth Imam Ali ibn 'Husain.