 The title for "king" he uses on his coinage is "malik", whilst the legend on the reverse is "d’ryw mlk’" ("Darius the King").The reason behind his adoption of the title of Darayan was seemingly because he felt strong enough to do so, and in spite of the difficulties that he and his successors faced, they did not renounce the title until the fall of the kingdom.The style of the silver drachmas under Darayan I was a continual of the one under the fratarakas.