They spoke French, the majority of them were vassals of the French crown, and the Anglo-Saxon Chronicle from shortly after the Conquest refers to “The King’s subjects, both English and French.”
The Bayeux Tapestry depicts, in a caption to a scene just after the deaths of Harold’s brothers, Gyrth and Leofwine, “Here fell the English and the French alike in the battle.” (HIC CECIDERUNT SIMUL ANGLI ET FRANCI IN PRELIO.)
There was clearly little distinction drawn between the Normans and their status as part of the French Kingdom. Normandy was a duchy held by William and his ancestors in the gift of the French crown.


Because one large part of France, located at the French Atlantic coast, has the beautiful name “Normandie”. “Normans” (Men from the North) were Vikings who settled in England and France.
Why weren’t they French? What is French? Do you have to be a descendant of Romans to be French? A French is a mixture of Roman, Celtic, Frankish, and Norman. And the Normans had Roman blood. When the Vikings came to Normandy in the ninth century, they took French brides who had Roman and Celtic blood.
They migrated to France and over time became French, in the Middle Ages the Duchy of Normandy was a vassal state of the Kingdom of France.
The French people are a mix of several ethnicities including Gauls, Celts, Germanics, and Normans.
In the 10th century Vikings settled near the Seine. The Franks called them (men from the North called Northmanni). This group of Vikings were aristocrats, and few in number. so they mixed with the native Franks and other Vikings joined them.