Hafsa bint Umar

Hafsa bint Umar (Arabic: حفصة بنت عمر, romanized: Ḥafṣa bint ʿUmar; c. 605–665) was the fourth wife of Muhammad and a daughter of the second caliph Umar (r. 634–644). In Islamic writings, her name is thus often prefixed by the title "Mother of the Believers" (Arabic: أمّ المؤمنين, romanized: ʾumm al-muʾminīn).

Source: Wikipedia — https://en.wikipedia.org/wiki/Hafsa_bint_Umar