Three thousand years of writing in Africa has yielded perhaps ten known biographies of African women written by Africans before the nineteenth century. Autobiographies by premodern African women are even rarer; an early hagiography about an Ethiopian woman, however, may constitute such a text. Gädlä Krəstos Śämra (The Life-Struggles of Krəstos Śämra [Christ Delights in Her), written in an Ethiopian monastery sometime between 1450 and 1508, is about a saintly woman who lived in the fifteenth century (no exact dates of her birth or death appear in her hagiography).]
Wendy Laura Belcher (Wed,) studied this question.