Al-Rumayṣāʾ bint Milḥān (; died  650 CE; 28 AH), popularly known by her kunya as Umm Sulaym, was one of the earliest women converts to Islam in Yathrib (now Medina).
Umm Sulaym, a significant figure in early Islamic history, is recognized for her conversion to Islam in Yathrib (now Medina), which occurred during a pivotal period in the development of the faith.