We call vikings who settles in north-west France the normans because in the ancient regime this part was known as normandy.
<u>Explanation:</u>
In the pre historic periods humans were present as normans in the north west France. As per information collected from Julius Caesar they lived in enclosed agrarian towns in a separate regions. Normally those who change their settlement frequently like refugees knows as nomads.
In 10th to 13th century Rollo of Normandy was the head of the vikings population. Later on his successor led the dynasty. With the passage of time vikings occupied a superior authority over other clan.