A devout English Catholic noblewoman — Richeldis de Faverches — prayed that she might undertake some special work in honor of Our Lady.

Source: https://www.ncregister.com/cna/pilgrims-to-walk-59-miles-to-england-s-our-lady-of-walsingham-shrine-this-summer

Thusnelda in is a powerful, fictional version of the Germanic noblewoman but the reality is that in that time period, Thusnelda wouldn’t have had the agency to make every decision for herself, and she was ultimately a victim of war and violence.

Source: https://screenrant.com/thusnelda-barbarians-character-real-person/