In the First World War, the Prime Minister, David Lloyd George, unveiled a statue to him in Cardiff City Hall and a postcard showing Owain at the Battle of Mynydd Hyddgen was sold to raise money for wounded Welsh soldiers.
Under første verdenskrig afslørede den walisiske premierminister David Lloyd George en statue af Owain for Cardiff City Hall, og et postkort der viste ham under slaget ved Mynydd Hyddgen blev solgt for at skaffe penge til sårede soldater.