The Alids are those who claim descent from Ali ibn Abi Talib (عَلِيّ بْن أَبِي طَالِب; 600–661 CE), the fourth Rashidun caliph (656-661) and the first imam in Shia Islam. Ali was also the cousin and son-in-law of the Islamic prophet Muhammad. The main branches are the Hasanids and Husaynids, named after Hasan and Husayn, the eldest sons of Ali from his marriage to Fatima, the daughter of Muhammad. As the progeny of Muhammad, they are revered by all Muslims. Another branch is the Alawids, the descendants of Ali through other women, whom he married after the death of Fatima, including the descendants of his son, Abbas, born to Umm al-Banin, a woman from the Banu Kilab. The Alids have led various movements in Islam, and a line of twelve Alids are the imams in Twelver Shia, the largest Shia branch.
Ahl al-Bayt
In addition to seventeen daughters, various sources report that Ali had eleven or fourteen, or eighteen sons. His first marriage was to Fatima, daughter of the Islamic prophet Muhammad, who bore Ali three sons, namely, Hasan, Husayn, and Muhsin, though the last one is not mentioned in some sources. Muhsin either died in infancy, or was miscarried after Fatima was injured during a raid on her house to arrest Ali, who had withheld his pledge of allegiance from the first Rashidun caliph Abu Bakr (632-634). The former report appears is Sunni sources and the latter in Shia sources. Hasan and Husayn are recognized as the second and the third Imams in Shia Islam, their descendants being known as the Hasanids and the Husaynids, respectively. They are revered by all Muslims as the progeny of Muhammad and honored by nobility titles such as Sharif and Sayyid. Ali and Fatima also had two daughters, namely, Zaynab and Umm Kulthum. After the death of Fatima in 632 CE, Ali remarried and had more children. Among them, the lineage of Ali continued through Muhammad ibn al-Hanafiya, Abbas ibn Ali, and Umar al-Atraf, their descendants were honored by the title Alawi (of Ali). Respectively, they were born to Khawla al-Hanafiyya, Umm al-Banin, and Umm Habib bint Rabi'a (al-Sahba).