NN d'Amiens, hereditiere d'Amiens

historical [modern] place name:

Austrasia, Kingdom of the Franks [Picardy, France]

https://en.wikipedia.org/wiki/Picardy
Picardy is one of the 27 regions of France. It is located in the northern part of France. ...From the 5th century the area was part of the Frankish Empire, and in the feudal period [9th-15th century] it encompassed the six countships of Boulogne, Montreuil, Ponthieu, Amiénois, Vermandois, and Laonnois. According to the 843 Treaty of Verdun the region became part of West Francia, the later Kingdom of France. See map in media section for historical boundaries of Picardy.