34%RatingSave Gender Feminine Usage Anglo-Saxon [1] Meaning & History Derived from the Old English elements milde "gentle" and burg "fortress". Saint Mildburg or Milburga, the sister of Saint Mildred, was a daughter of a 7th-century Mercian king. She was supposedly in possession of magical powers. Related NamesFamily Tree·Details VariantMilburga Categories defence, gentleness Sources & References Prosopography of Anglo-Saxon England, available from http://www.pase.ac.uk/jsp/index.jsp.