The duchy passed to his younger brother Robert I . In January of 1027 he was married to Adela , a younger daughter of King Robert II of France .
With Nicholas out of the way the duchy passed to his Richard III 's younger brother Robert , who became the sixth duke of Normandy as Robert I . In January of 1027 he was married to Adela a younger daughter of Robert II of France and Constance of Arles .