Complex sentence: The adjective "Norwegian", recorded from c.1600, is derived from the latinisation of the name as "Norwegia"; in the adjective "Norwegian", the Old English spelling'-weg' has survived.
Split into simpler sentences: The adjective "Norwegian", on the other hand, recorded from c.1600, is derived from the latinisation of the name as "Norwegia". In the adjective "Norwegian", the Old English spelling'-weg' has survived.