Hasan ibn Ali (May Allah be pleased with him)

Son of Ali and Fatimah, grandson of the Prophet and leader associated with reconciliation between two Muslim groups.

Hasan was born in Madinah, commonly dated 3 AH, to Ali and Fatimah.

He was Husayn’s elder brother; childhood companionship and later political responsibility are distinct phases.

He was the Prophet’s maternal grandson and a Hashimite through his father; Husayn, Zaynab and Umm Kulthum were siblings.

He had children and descendants of his own, distinct from Husayn’s line.

In Bukhari 3746 the Prophet calls him a leader through whom two Muslim groups may reconcile.

After Ali’s death he assumed leadership and reached a settlement with Muawiyah in 41 AH.

He later lived in Madinah and was buried at al-Baqi; 49 and 50 AH are among reported death dates.

Historical poisoning accounts do not uniformly establish a named perpetrator, so no uncertain attribution is made.