Bibi Umme e Kulsoom was married to Janab E Aun bin jafar bin Abi Talib or Janab e Mohammad bin jafar bin Abi talib?

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According to some historians, Umm Kulthum married 'Uwn b. Ja'far b. Abi Talib, her cousin. When he passed away, she married his brother, Muhammad.

For detail please click the link below:
http://en.wikishia.net/view/Umm_Kulthum_bt._al-Imam_%27Ali_(a)