An abbess is the female counterpart of an abbot. In the early medieval period, they were often of noble or royal birth and exercised significant temporal and spiritual authority. Abbesses and Early Medieval Book Culture - JHI Blog
An is the female superior of a community of nuns, typically within orders such as the Benedictines, Cistercians, and Poor Clares. Derived from the Aramaic abba ("father"), the title signifies her role as the "spiritual mother" of her cloistered community. Historically, abbesses held immense power, often equivalent to that of a bishop within their own territories. Historical & Ecclesiastical Role abbess