Theodelinda also spelled Theudelinde, was a queen of the Lombards by marriage to two consecutive Lombard rulers, Autari and then Agilulf, and regent of Lombardia during the minority of her son Adaloald, and co-regent when he reached majority, from 616 to 626. For well over thirty years, she exercised influence across the Lombard realm, which comprised most of Italy between the Apennines and the Alps. Born a Frankish Catholic, she convinced her first spouse Autari to convert from pagan beliefs to Christianity.

The Lombards or Longobards were a Germanic people who conquered most of the Italian Peninsula between 568 and 774.