After his father Barisan died in 1150, Helvis married the constable of Jerusalem, Manasses of Hierges, who was one of the strongest supporters of Queen Melisende in the power struggle against her son King Baldwin III. Manasses was exiled in 1152 when Baldwin was victorious in this struggle, allowing Hugh to inherit Ramla from his mother. Hugh took part in the Siege of Ascalon in 1153, and in 1157 was captured in battle at Banias, being released probably the next year. In 1159 he visited the Principality of Antioch and met with Byzantine emperor Manuel I Comnenus, who had arrived to assert his suzerainty over the principality. In 1163 Hugh married Agnes of Courtenay (1133 – 1184/1185), the former wife of King Amalric, by whom he had no issue. It is possible that Agnes had already been betrothed or married to him before 1157, date some say it was the one of the actual marriage but she married Amalric after Hugh was taken prisoner; Amalric was forced to divorce her before becoming king in 1163.