They were descendants of the second Shi'a Imam (Imam Hasan ibn Ali) and brought Islam to the south Caspian Sea region of Iran.
Muhammad Ali | Hyder Ali | Muhammad Ali Jinnah | Ali | Muhammad Ali of Egypt | Zulfikar Ali Bhutto | Ali Akbar Khan | Tariq Ali | Saif Ali Khan | Asif Ali Zardari | Ali Shariati | Ali Abdullah Saleh | Ibn Khaldun | Ibn Battuta | Ali Mohammed Ghedi | Ali Khamenei | Ali Pasha | Ali G Indahouse | Nusrat Fateh Ali Khan | Husayn ibn Ali | Hasan ibn Ali | Ali Imam | Saadat Hasan Manto | Michael Nazir-Ali | Laila Ali | Jebel Ali | Ibn Hisham | Ali Baba | Zine El Abidine Ben Ali | Wajid Ali Shah |
Yahya bin al-Husayn bin al-Qasim ar-Rassi was born in Medina, being a Sayyid who traced his ancestry from Hasan, son of Ali (and also grandson of Muhammad).
Genealogoical chart of the descent from the Prophet of the Idrisid dynasty, rulers of Fez and Morocco, Kings of Tunis, and the Senussi dynasty, founders and heads of the Libyan Senussi Order and Kings of Libya are also descended from the other brother Hasan ibn Ali through Al Hassan Addakhil.
The Messenger of Allah, peace be upon him, said: This verse has been revealed upon five persons: Myself, 'Ali, Fatimah, Hasan and Hussein: Surely, Allah desires only to remove the impurity from you, O People of the Household, and to Purify you completely
The origin of this act goes back to the birth of Prophet Muhammad's grandson, Hasan ibn Ali when the prophet's daughter Fatimah gave out colored sugar cubes to the people in celebration of her new born child on the 15th of Ramadan.
Marsiya (or elegy), is nearly always on the death of Hasan and Husain and their families, but occasionally on the death of relatives and friends.
Abu Muḥammad al-Ḥasan ibn ‘Alī ibn al-Ḥasan ibn ‘Alī ibn ‘Umar al-Ashraf ibn ‘Alī Zayn al-‘Ābidīn (Medina, ca. 844 – Amul, January/February 917), better known as al-Ḥasan al-Uṭrūsh ("the Deaf"), was an Alid Shia missionary of the Zaydi sect who re-established Zaydid rule over the province Tabaristan in northern Iran in 914, after fourteen years of Samanid rule.