 People with the last name Wasti or Zaidi are purportedly the direct descendants of the Prophet Muhammad's great-grandson Imam Zain-ul-Abideen, whose real name was Ali ibn Husain (Ali son of Husain).Zaidi (or people belonging to this family) can be found all over the world, especially in Iran and Indo-Pak subcontinent.Some Zaidis are known as Wasitis.