Complex sentence: It originated in the 10th century Ad when Ruellan 1 De DOL of Bretagne in France became the first Duke of Normandy, he was also known as Rollo the Norman Viking.
Split into simpler sentences: It originated in the 10th century AD when Ruellan 1 De DOL of Bretagne in France became the first Duke of Normandy. He was also known as Rollo the Norman Viking.