 Based on the following text, answer the question. If the answer is not in the text, say 'No information provided.' Text: The Normans (NAME_1: Nourmands; French: Normands; Latin: Normanni) were the people who in the 10th and 11th centuries gave their name to NAME_2, a region in France. They were descended from NAME_3 ("NAME_1" comes from "Norseman") raiders and pirates from Denmark, Iceland and Norway who, under their leader NAME_4, agreed to swear fealty to King Charles III of West Francia. Through generations of assimilation and mixing with the native Frankish and Roman-Gaulish populations, their descendants would gradually merge with the Carolingian-based cultures of West Francia. The distinct cultural and ethnic identity of the Normans emerged initially in the first half of the 10th century, and it continued to evolve over the succeeding centuries. Remember, if the answer is not in the text, say 'No information provided.' Question: Who gave their name to NAME_2 in the 1000's and 1100's