Complex sentence: Antoine d'Arces, or d'Arcy, usually known as'De la Bastie' in Scottish history, was known as the White Knight, (Chevalier Blanc), from his white clothes or armour.
Split into simpler sentences: Antoine d'Arces, or d'Arcy, is usually known as'De la Bastie' in Scottish history. He was called the White Knight, (Chevalier Blanc), from his white clothes or armour.