Hugh concluded a treaty with the Seldjuq Sultan of Rum which guaranteed that the merchants from Cyprus and Rum could safely run their business in both countries. He gave his sister, Helvis, in marriage to Bohemond IV's rival, Raymond-Roupen, although she had been married to Odo of Dampierre (who was Walter of Montbéliard's kinsman). Odo of Dampierre urged the pope to intervene and prevent the new marriage. Hugh supported John of Brienne's opponents, according to a 1213 letter of Innocent III. The pope also rebuked him for capturing John of Brienne's vassals whom Muslim ships had forced to land at Cyprus.