Theodelinda

Theodelinda, also spelt Theudelinde (c. 570 – 628 AD), was a queen of the Lombards through marriage to two successive Lombard kings, Authari and Agilulf. She later served as regent of the Kingdom of the Lombards during the minority of her son, Adaloald, and as co-regent after he came of age, from 616 to 626. For well over thirty years, she wielded considerable influence throughout the Lombard realm, which encompassed much of Italy between the Apennines and the Alps.

Source: Wikipedia — https://en.wikipedia.org/wiki/Theodelinda