Regintrud was a Frankish noblewoman who lived during the late 7th and early 8th centuries. Born around 660, she is believed to have been a duchess, potentially through her marriage to a Bavarian duke such as Theodbert or Theodo. While historical accounts regarding her specific parentage vary, she is often linked to King Dagobert I or the family of Hugobert and Irmina. She is recognized as a saint and may have served as the abbess of Nonnberg Abbey during the early 720s.