Umm Kulthum bint 'Uqba was the daughter of 'Uqba ibn Abu Mu'ayt and sister of Walid ibn 'Uqba.
At the Treaty of Hudaybiyyah, Umm Kulthum bint 'Uqba, daughter of the Prophet's (peace be upon him) enemy 'Uqbah bin Abu Mu'ayt, sought asylum with the Muslims when she learned that a revelation (60:10) had said that women seeking the Prophet did not have to be returned to their families and men, unlike the custom for male escapees.
First, she married Zayd ibn Harithah (may Allah be pleased with him). After Zayd was killed in battle of Mu'ta she married Az-Zubayr (may Allah be pleased with him) who divorced her after a while. Then she married Abd al-Rahman ibn Awf (may Allah be pleased with him) and bore him two sons, Ibraheem and Hameed. After Abd al-Rahman's (may Allah be pleased with him) death she married 'Amr ibn al-'Aas (may Allah be pleased with him) and died after one month of the marriage.
Source: at-Tabakat al-Kubraa of Ibn Sa'd.