It was named after the region and former duchy in northeastern France, a remnant of the medieval kingdom Lotharingia.
The Bishops of Metz had already ruled over a significant amount of territories within the former Kingdom of Lotharingia, which by the 870 Treaty of Meerssen became a part of East Francia.
As well as the information it contains on events in Lotharingia and Germany, and on attitudes of the time, Cathróe's life is of particular interest to historians for the light it sheds on southern Scotland in the 10th century.
However, Matilda lived a different life than her two sisters, she was to marry Ezzo, Count Palatine of Lotharingia.
They had various tasks: representatives of the king in the provinces, they were responsible for the administration of the royal domain and for the protecting and guiding the legal system in certain duchies, such as Saxony and Bavaria, and, in particular, Lotharingia.
The biographical profile of her legendary husband, duke Witger of Lotharingia, is inspired on an historical figure from the 10th century, Wigeric of Lotharingia.
The Ardennes-Verdun dynasty, centered on Verdun, dominated Lotharingia in the 11th century.
Lotharingia was divided for much of the later ninth century, reunited under Louis the Younger by the 880 Treaty of Ribemont and upon the death of East Frankish king Louis the Child in 911 it joined West Francia under King Charles the Simple.
In 1668, Elector Charles I Louis forced Lotharingian troops from the castle and razed the fortifications.
Increasingly, the count palatine of Lotharingia, whose office had been attached to the royal palace at Aachen from the 10th century onward, became the real successor to the Carolingian count palatine.
Richeza of Lotharingia (also called Richenza, Rixa, Ryksa; born about 995/1000 – died Saalfeld, 21 March 1063), was a German noblewoman by birth, a member of the Ezzonen dynasty.