Gerberge NN

https://en.wikipedia.org/wiki/Sire_de_Bourbon

The Sire de Bourbon or Seigneur de Bourbon, meaning Lord of Bourbon, was the title by which the rulers of the Bourbonnais were known, from 913 to 1327, and from which the cognomen of the illustrious royal House of the same name derives.

Bourbonnais was a historic province in the centre of France that corresponded to the modern département of Allier, along with part of the département of Cher.