Mildthryth was an Anglo-Saxon abbess who lived during the 7th and 8th centuries. As the daughter of King Merewalh of Magonsaete and Domne Eafe, she belonged to a royal lineage with significant connections to the Merovingian rulers of Gaul. After receiving an education at the royal abbey of Chelles, she joined the monastery at Minster-in-Thanet, which her mother had founded. By 694, she had risen to the position of abbess, leading the Benedictine community until her death at the abbey.