Sayyed Ahmad Alavi
Sayyed Ahmad Alavi, also known as Ahmad b. Zayn al-' Abidin al -' Abidin al -' Alawi al -' Amili, or Mir Sayyid Ahmad' Alavi' Amili,( d. between 1644- 1650) was a Safavid philosopher and theologian of the Philosophical school of isfahan.
Yahya ibn Umar
Yahya ibn Umar ibn Yahya ibn Husayn ibn Zayd ibn Ali Zayn al- Abidin ibn Al- Husayn ibn Ali al- Murtada was an Alid Imam.
His mother was Umm al- Husayn Fatimah bint al- Husayn ibn Abdallah ibn Ismail ibn Abdullah ibn Ja`far ibn Abī Tālib.
In the days of the Abbasid Caliph Al- Musta'in, he marched out from Kufa and lead an abortive uprising from Kufa in 250 A.H.( 864-65 C.E.), but was killed by the Abbasid forces led by Hussain ibn Isma’il, who had been sent to deal with him.
Ali ibn Husayn Zayn al-Abidin
Ali ibn Husayn Zayn al-Abidin , also known as al-Sajjad  ("The Consistently Prostrating") or simply Zayn al-Abidin
("Adornment of the Worshippers"), was the fourth Shia Imam, after his father Husayn ibn Ali, his uncle Hasan ibn Ali, and his grandfather Ali ibn Abi Talib.
Ali ibn Husayn survived the Battle of Karbala in 680 CE, after which he and other surviving family members and companions of Husayn were taken to Yazid I in Damascus.
Eventually, he was allowed to return to Medina, where he led a secluded life with a few intimate companions.
Imam Sajjad's life and statements were entirely devoted to asceticism and religious teachings, mostly in the form of invocations and supplications.
His famous supplications are known as Al-Sahifa al-Sajjadiyya.
Husayn ibn Ali
Al-Husayn ibn Ali ibn Abi Talib (10 January 626 – 10 October 680) was a grandson of the Islamic prophet Muhammad and a son of Ali ibn Abi Talib and Muhammad's daughter Fatimah.
He is an important figure in Islam as he was a member of the Household of Muhammad
("Ahl al-Bayt") and the People of the Cloak ("Ahl al-Kisā'"), as well as the third Shia Imam.
Prior to his death, the Umayyad ruler Mu'awiya appointed his son Yazid as his successor, contrary to the Hasan-Muawiya treaty.
When Muawiya died in 680 CE, Yazid demanded that Husayn pledge allegiance to him.
Husayn refused to pledge allegiance to Yazid, even though it meant sacrificing his life.
As a consequence, he left Medina, his hometown, to take refuge in Mecca in AH 60.
There, the people of Kufa sent letters to him, asking his help and pledging their allegiance to him.
So he traveled towards Kufa, after getting some favorable indications along with a small caravan of his relatives and followers but near Karbala
his caravan was intercepted by Yazid's army.
He was killed and beheaded in the Battle of Karbala on 10 October 680 (10 Muharram 61 AH) by Yazid, along with most of his family and companions, including Husayn's six month old son, Ali al-Asghar, with the women and children taken as prisoners.
Anger at Husayn's death was turned into a rallying cry that helped undermine the Umayyad caliphate's legitimacy, and ultimately its overthrow by the Abbasid Revolution.
The annual commemoration of Husayn and his children, family and companions occurs during Muharram, the first month of the Islamic calendar, and the day he was martyred is known as "Ashura" (the tenth day of Muharram, a day of mourning for Shi'i Muslims).
Husayn's actions at Karbala fueled later Shi'a movements, and his death was decisive in shaping Islamic and Shi'a history.
The timing of Husayn's life and death were crucial as they were in one of the most challenging periods of the seventh century.
During this time, Umayyad oppression was rampant, and the stand that Husayn and his followers took became a symbol of resistance inspiring future uprisings against oppressors and injustice.
Throughout history, many notable personalities, such as Nelson Mandela and Mahatma Gandhi, have cited Husayn's stand against oppression as an example for their own fights against injustice.
Ahmad ibn Mubarak
Ahmad ibn Mubarak was the seventh Tayyibi Isma'ili" Dāʿī al- Muṭlaq" in Yemen, from 1229 to his death in 1230.
He was the cousin of the fifth" Dāʿī", Ali ibn Muhammad.
He was succeeded by al- Husayn, the son of Ali ibn Muhammad.
Al-Layth
Al- Layth ibn Ali ibn al- Layth( died 928) was amir of the Saffarid amirate from 909 until 910.
He was the son of Ali ibn al- Layth and nephew of the first two Saffarid rulers, Ya' qub ibn al- Layth and Amr ibn al- Layth.
Ibrahim ibn al-Husayn (Ibn al-Walid)
Ibrahim ibn al- Husayn ibn Ali ibn Muhammad ibn al- Walid was the eleventh Tayyibi Isma'ili" Dāʿī al- Muṭlaq" in Yemen, from 1287 to his death in 1328.
Ali ibn al-Husayn ibn Ali ibn Hanzala
Ali ibn al- Husayn ibn Ali ibn Hanzala was the tenth Tayyibi Isma'ili" Dāʿī al- Muṭlaq" in Yemen, from 1284 to his death in 1287.
He was the son of al- Husayn, the" maʾdhūn"( senior deputy) to his predecessor, the ninth" Dāʿī", also named Ali ibn al- Husayn, and grandson of the sixth" Dāʿī", Ali ibn Hanzala.
Ali and his grandfather belonged to the Banu Hamdan and were the only ones to break the monopoly of the Qurayshi Ibn al- Walid family on the office of" Dāʿī al- Muṭlaq" during the 13th century.
He was succeeded by another Ibn al- Walid, Ibrahim ibn al- Husayn.
Ali ibn al-Husayn (Ibn al-Walid)
Ali ibn al- Husayn ibn Ali ibn Muhammad ibn al- Walid was the ninth Tayyibi Isma'ili" Dāʿī al- Muṭlaq" in Yemen, from 1268 to his death in 1284.
He was the son and chief assistant of the eighth" Dāʿī", al- Husayn ibn Ali, and thus a member of the Banu al- Walid al- Anf family, that dominated the office of" Dāʿī al- Muṭlaq" almost continuously in the 13th to early 16th centuries.
During his tenure, Ali moved from his original seat at Sanaa to the Hamdanid fortress of Arus.
He returned to Sanaa only after it was recaptured by the Hamdanids, and died there.
He was succeeded by Ali ibn al- Husayn ibn Ali ibn Hanzala, the grandson of the sixth" Dāʿī", Ali ibn Hanzala, and son of Ali's own" maʾdhūn"( senior deputy).
Hubba bint Hulail
Hubba bint Hulail was the grandmother of Hashim ibn' Abd Manaf, thus the great- great- great- grandmother of the Islamic" Nabī"( Prophet) Muhammad ibn Abdullah.

Question: Who is Ali Ibn Husayn Zayn Al-Abidin's paternal grandmother?
Answer: Fatimah