Complex sentence: The surname has a long history in the county of Kent, England, and probably elsewhere in the UK where Dutch and German groups from the North Sea Bight would have easily landed during the various Germanic migrations to the island during the first millennium AD.
Split into simpler sentences: The surname has a long history in the county of Kent, England, and probably elsewhere in the UK. From a perspective of ancient origins, Kent and other Eastern areas were convenient landing points where germanic groups from the North Sea Bight would have easily landed during the various Germanic migrations to the island during the first millennium AD.