The Anglo-Saxons were a cultural group who inhabited England. They traced their origins to the 5th century settlement of incomers to Britain, who migrated to the island from the North Sea coastlands of continental Europe. However, the ethnogenesis of the Anglo-Saxons occurred within Britain, and the identity was not merely directly imported. The development of an Anglo-Saxon identity arose from the interaction between incoming groups of people from a number of Germanic tribes, both amongst themselves, and with indigenous British groups. Many of the natives, over time, adopted Anglo-Saxon culture and language and were assimilated. The Anglo-Saxons established the Kingdom of England, and the modern English language owes almost half of its words – including the most common words of everyday speech – to their language.