Umm Kulthum bint Ali
Umm Kulthum bint Ali (Arabic: أم كلثوم بنت علي) (birth : Wednesday, 18 Rabi' ul-Awwal, 9 A.H/ July 6, 630 A.D (Gregory Calendar) was the fourth child of Ali ibn Abu Talib (the fourth Rightly Guided Caliph and first Shi’a Imam) and Fatima, the daughter of Muhammad.She is also known as “Zainab the Junior".
Umm Kulthūm bint Ali was the fourth child and second daughter of ‘Ali and Fatima. She was also the granddaughter of Muhammad and sister of Imam Hussein and Imam Hassan. She also survived during the battle of Kerbala.
Recognizing the marriage
The shi'a authors Muhammad Al-Hassun and Umm ‘Ali Mashkur stated in their book "A'lam al-Nisaa al-Mu'minat": “ The marriage of Umm Kulthum to ‘Umar ibn al-Khattab is counted amongst the important issues presented to us by Islamic history, and as one of those matters around which debate and research has continued at length—and still continues. Those who regard this marriage as an authentic fact use it to prove the righteousness of her husband ‘Umar and ‘Ali’s acceptance of him. Otherwise, why would he give him his daughter in marriage? As for those who reject the historic occurrence of the marriage, or are of the opinion that it took place under pressure which ‘Umar brought to bear upon ‘Ali use this issue to justify the unrighteousness and viciousness of ‘Umar, and that ‘Ali did not approve of him. ”
Sources of marriage
It was not possible to ascertain who had died first. They did not inherit from one another and their funeral prayers were read at the same time.
Umm Kulthum is buried in Baab Sagheer cemetery in Damascus, Syria. The Fatimid/Dawoodi Bohra believe that the Mausoleum at Damascus named as of Zaynab-ul-Kubra is of Umm Kulthum (may be confusion in 'Sugra' or 'Kubra') and the mausoleum of the elder daughter of Ali, Zaynab bint Ali, is in Cairo.
Comments from History on Mausoleum
The following history quote mentioned in media/web (The Heroine Of Kerbela: A Visit To The Mosques Of Sayeeda Zainab In Egypt and Syria, by Moushira El-Fishawy also indicates that the Mausoleum of Umm-Kulthum is located in Arrawiya village in Damascus, which is the same place as present Zaynabia: “Sayeeda Zainab was born in the 6th year of Hegira in the house of the Prophet in Medina ….“Zainab the Senior”, to distinguish her from “Zainab the Middle One”, her sister born in year 9 of Hegira (named “Um Kaltoum”, after her aunt), … “Zainab the Junior, whose mausoleum is in Arrawiya village in Damascus, according to Ibn Al Hourani, in his work “Places of Visits” and al-Mousili, in his book “Al Ma’aref” (Knowledge).”
- Al-Maarif, by Ibn Qutaybah, page 77, Chapter "Dhikr Umar" 
- Al-Istiab, Volume 4, page 492
- Asad al-Ghaybah fi Marifathul Sahaba, Volume 5, page 367
- Tareekh Baghdad, Volume 6, page 182
- Tareekh Khamees, Volume 2, page 384, Dhikr Umm Kalthum
- Tabaqat ibn Sa'd, Volume 8, page 463, Dhikr Umm Kalthum
- Sawaiqh al-Muhriqa, page 94
- Zakhair al-Akba, pages 168 and 169
- Asaaf al-Ghaneen, page 162
- Al-Isaba, Volume 4, page 321
- Furu' al-Kafi, vol. 6, p. 117, Dar al-Adwa, Beirut 1992
- “A‘lam an-Nisa al-Mu’minat” (p. 182) by Muhammad al-Hassun and Umm ‘Ali Mashkur"
- 'Tahdeeb al-Ahkam Vol.2, p.380 in Chapter “Meeras (inheritance)”'