Hasan ibn Ali
Al-Hasan ibn Ali ibn Abi Talib (624–670 CE), sometimes spelled Hasan or Hassan, was the eldest son of Ali and Muhammad's daughter Fatimah, and was the older brother of Husayn.
Muslims respect him as a grandson of the Islamic Prophet Muhammad.
Among Shia Muslims, Hasan is revered as the second Imam.
Hasan was elected for the caliphate after his father's death, but abdicated after six or seven months to Muawiyah I, the founder of the Umayyad dynasty to end the First Fitna.
Al-Hasan was known for donating to the poor, his kindness to the poor and bondmen, and for his knowledge, tolerance and bravery.
For the rest of his life, Hasan lived in Medina, until he died at the age of 45 and was buried in the Jannat al-Baqi cemetery in Medina.
His wife, Ja'da bint al-Ash'at, is commonly accused of having poisoned him.
Where Was I
" Where Was I?" may refer to:
Kamāl al-Dīn al-Fārisī
Kamal al- Din Hasan ibn Ali ibn Hasan al- Farisi or Abu Hasan Muhammad ibn Hasan( 1267 – 12 January 1319, long assumed to be 1320)) was a Persian Muslim scientist.
He made two major contributions to science, one on optics, the other on number theory.
Farisi was a pupil of the astronomer and mathematician Qutb al- Din al- Shirazi, who in turn was a pupil of Nasir al- Din Tusi.
According to Encyclopædia Iranica, Kamal al- Din was the most prominent Persian author on optics.
Beshr ibn Hasan
Beshr ibn Hasan( Arabic: بشر بن حسن) was a great- grandson of Muhammad.
He was the son of second Shia Imam Hasan ibn Ali.
He is considered to be one of the martyrs of the Battle of Karbala, although no record describes the circumstances surrounding his death by enemy forces.
The first instance of Beshr ibn Hasan to be listed among the martyrs of Karbala was by Shia scholar Ibn Shahrashub.
Of Hasan ibn Ali's twenty sons, seven participated in the battle, among them Beshr ibn Hasan.
All but one brother was killed during the battle.
In his account of their deaths, Shahrashub writes on Beshr:" ... and it has been said that Beshr has been martyred, too."
Among Beshr ibn Hasan's brothers who were present at the event of Ashura were Amrobne Hasan( who was killed in the event at Karbala when he was a child), Hasan ibn Hasan( who was famously known as' Hasan Muthanna'), Qasim ibn Hasan( who was also considered to be one of the martyrs of Karbala), Abdullah ibn Hasan( Abdullah Asghar).
Talha ibn Abd Allah al-Khuza'i
Abū Muḥammad Ṭalḥa ibn ʿ Abd Allāh ibn Khalaf al- Khuzāʿī, better known as Talha al- Talahat literally" Talha of the Talhas"( died 684- 5) was a military commander of the Umayyad Caliphate and governor of Sistan.
The nickname Talha al- Talahat was because his mother was called Talha bint Abi Talha," Talha the daughter of Talha's father".
Around 683( or early 684) he was appointed governor of Sistan by the governor of Khurasan, Salm ibn Ziyad, at the place of the latter's brother Yazid ibn Ziyad.
Yazid had been killed in a disastrous raid on the Zunbil of Zabulistan and the shahs of Kabul in eastern Afghanistan, during which another brother, Abu Ubayda, was taken prisoner; it was necessary to ransom the Arab captives from the Zunbil or the local princes of Zamindawar and Zabulistan.
Salm dismissed Talha, but later restored him to his office.
He died shortly afterward in 684/5.
Ruzaiq, the ancestor of the Tahirid dynasty, became a" mawla" of Talha during his rule in Sistan( 683–685).
Ruzaiq
Ruzaiq( also spelled Ruzayq) was an Iranian nobleman who lived during the 7th and 8th- century.
As the great- grandfather of Tahir ibn Husayn, he was the ancestor of the Tahirid dynasty.
Originally a Zoroastrian, he later converted to Islam and became the" mawla" of Talha ibn Abd Allah al- Khuza'i, an Arab nobleman from the Khuza'i tribe, who served as the governor of Sistan.
Ruzaiq's son Mus'ab later played a prominent role in the Abbasid Revolution, and was later rewarded by the Abbasid caliphs by being appointed as the governor of Pushang and Herat.
Ruzaiq probably died some years later.
Talha ibn Hasan
Talha ibn Hasan  was, according to a Sunni source, the son Umm Ishaq bint Talhah and Hasan ibn Ali.
Hasan was the second Shi'a
Imam and Umm Ishaq was the daughter of the prominent Muslim general, Talha ibn Ubayd-Allah.
Muhammad ibn Talha
Muhammad ibn Talhah was, according to a Sunni source, the son of the prominent Muslim general Talha ibn Obaidullah and Hammanah bint Jahsh.
Hammanah was the sister of Zaynab bint Jahsh, one of Muhammads wives.
He and his father died at the battle of the Camel.
Muhsin ibn Husayn
Muḥsin ibn Ḥusayn ibn Ḥasan ibn Abī Numayy was Emir of Mecca and ruler of the Hejaz in partnership with Idris ibn Hasan from 1603 to 1624, then independently from 1624 to 1628.
Muhsin was born in Jumada I 984 AH( August/ September 1576).
He was raised by his uncle Abu Talib ibn Hasan.
After the death of Sharif Abu Talib in Jumada II 1012 AH( November 1603), the" ashraf" of Mecca elected Idris ibn Hasan as Emir, with his brother Fuhayd and nephew Muhsin as co- Emirs.
Fuhayd and Muhsin were included in the" du'a" alongside Idris, and were together allotted a quarter of the Emirate's income.
Sultan Ahmed I confirmed the appointment of the three sharifs, and sent a decree that was read out in the Masjid al- Haram on Wednesday, 11 Safar 1013 AH( 7 July 1604).
In late Rabi II 1019 AH( July 1610), Idris and Muhsin deposed Fuhayd.
On Thursday, 4 Muharram 1034 AH( 16 October 1624) the" ashraf" deposed Idris and proclaimed Muhsin as sole Emir of Mecca.
He received an official decree from Sultan Murad IV in Ramadan( June 1625).
In mid-Ramadan 1037 AH( May 1628) Muhsin surrendered the Emirate to Ahmad ibn Abd al- Muttalib, then departed to Yemen.
He died near Sanaa on 6 Ramadan 1038 AH.
He was buried in Sanaa, and a qubba was built over his grave.
Hasan ibn Hasan
Hasan ibn Hasan (Arabic: حسن بن حسن, Hasan al-Muthana ibn Hasan ibn Ali, popularly known as Hasan al-Muthana) was a great-grandson of Muhammad.

Question: Where did Talha Ibn Hasan's father die?