Complex sentence: Ammersee and Amper are part of the ancient Celtic amber tradingroute leading to the Brenner Pass ("Burner"-pass) and their names may be derived from the word Amber.
Split into simpler sentences: Ammersee and Amper are part of the ancient Celtic amber tradingroute leading to the Brenner Pass. The names "Ammer" and "Amper" may be derived from the word Amber.