Hildegard

Hildegard (c. 757/758 – 30 April 783) was a Frankish queen and the wife of Charlemagne from c. 771 until her death. Hildegard was a noblewoman of Frankish and Alemannian heritage. Through eleven years of marriage with Charlemagne, Hildegard helped share in his rule as well as having nine children with him, including the kings Charles the Younger and Pepin of Italy and the emperor Louis the Pious.

Source: Wikipedia — https://en.wikipedia.org/wiki/Hildegard_(queen)