Robert Marmion was an Anglo-Norman nobleman and rebel involved in the First Barons' War. He was referred to as "Robert Marmion the Younger" as his elder half-brother was also called Robert and known as .
Robert Marmion was an Anglo-Norman nobleman and rebel involved in the First Barons' War. He was referred to as "Robert Marmion the Younger" as his elder half-brother was also called Robert and known as . (en)