Person
Umm Kulthūm bint Muhammad ﷺ
أم كلثوم بنت محمد ﷺ
603 CE – 630 CE(aged ~27) Banū Hāshim
Third daughter of the Prophet ﷺ. Originally betrothed to ʿUtayba ibn Abī Lahab (brother of ʿUtba); also divorced before consummation when Sūrat al-Masad was revealed. After her sister Ruqayya's death, she married ʿUthmān ibn ʿAffān (3 AH / 625 CE), who because of marrying two daughters of the Prophet ﷺ in turn was given the kunya Dhū al-Nūrayn ("Possessor of the Two Lights"). Died childless in 9 AH.
Significance
Third daughter of the Prophet ﷺ. Originally betrothed to ʿUtayba ibn Abī Lahab (brother of ʿUtba); also divorced before consummation when Sūrat al-Masad was revealed. After her sister Ruqayya's death, she married ʿUthmān ibn ʿAffān (3 AH / 625 CE), who because of marrying two daughters of the Prophet ﷺ in turn was given the kunya Dhū al-Nūrayn ("Possessor of the Two Lights"). Died childless in 9 AH.
Sources: Wikipedia and classical Islamic biographical literature compiled by automated researchers. Every page is being continuously refined — if something looks off, please check back in a few days.