الحسن
al-Ḥasan
Person
The Prophet’s elder grandson (625–670), who made peace with Muawiya to end the civil war.
What it means
Hasan, son of Ali and Fatima, was the Prophet’s grandson. The Prophet said of him “this son of mine is a master; God will make peace between two great groups of Muslims through him” (Sahih al-Bukhari). He became caliph after Ali’s death in 661 and gave up the office to Muawiya within months, to end the fighting. He died in 670, reportedly poisoned.
Term and Arabic as listed in Ismail al Faruqi, Toward Islamic English (International Institute of Islamic Thought, 1995), p. 29, listed as AL ḤASAN. The definition is restated here.