Mentewab was Empress of Ethiopia, consort of Emperor Bakaffa, mother of Iyasu II and grandmother of Iyoas I. She was also known officially by her baptismal name of Walatta Giyorgis. Mentewab was a major political figure during the reigns of her son the Emperor Iyasu and grandson Iyoas. Empress Mentewab was also known by the honorific of Berhan Mogassa. This was to complement the honorific of her son Iyasu II, who was Berhan Seged.

Bakaffa birth name: Missah; throne name Aṣma Giyorgis , later Masih Sagad was Emperor of Ethiopia from 18 May 1721 to 19 September 1730, and a member of the Solomonic dynasty. He was a son of Emperor Iyasu I and brother to Emperors Tekle Haymanot I and Dawit III.