Zaynab al-Sughra (second listed) bint Ali

The principal identity problem is the repeated use of the names Zaynab and Umm Kulthum among the daughters of Imam Ali. The child list quoted from Shaykh al-Mufid first records Zaynab al-Kubra and the Fatimid Zaynab al-Sughra whose kunya was Umm Kulthum, and later lists another Zaynab, the youngest, among daughters of different mothers. The present person corresponds to that separately listed daughter, not to Zaynab al-Kubra and not to the Fatimid Umm Kulthum.

Later genealogical and biographical sources commonly describe this Zaynab's mother as an unnamed umm walad. Nasab Quraysh, biographical notices for Abdullah ibn Muhammad ibn Aqil, Umdat al-Talib, and Akhbar al-Zaynabat connect her with Muhammad ibn Aqil ibn Abi Talib. Abdullah ibn Muhammad ibn Aqil is identified as her son, while Nasab Quraysh also names Abd al-Rahman and al-Qasim. The link to Muhammad ibn Aqil is therefore the strongest preserved genealogical account, although her mother's personal name and the details of her birth remain unknown.

The spouse evidence is not uniform. Nasab Quraysh says that after Muhammad ibn Aqil she married Kathir ibn al-Abbas and bore a daughter named Umm Kulthum. By contrast, al-Muhabbar names Firas ibn Ja'da ibn Hubayra as the husband of Zaynab al-Sughra bint Ali. The conflict may reflect confusion between similarly named daughters or divergent genealogical transmission, so no single spouse can safely be declared certain. No reliable early source establishes an independent teaching career, participation at Karbala, or a separate political activity for her.

The work known as Akhbar al-Zaynabat briefly reports that she died in Medina, but it supplies neither a dependable date nor an individually identified grave. A later attempt to connect a Damascus-area shrine attributed to Umm Kulthum with this Zaynab is disputed and does not establish her burial there. The cautious conclusion is that she was a separately remembered daughter of Ali, her mother was described as an unnamed umm walad, the connection to Muhammad ibn Aqil is strong although the overall marriage tradition is not uniform, and her burial place is unknown.