Gabriel may have had plans to incorporate Edessa into his realm, which is why he gave his daughter in marriage to Thoros of Edessa. However, both she and her husband were killed in 1098 after which the
crusader Baldwin of Boulogne became
count of Edessa. He seems to have offered his other daughter,
Morphia, to another crusader,
Bohemond of Taranto, who had become the
prince of Antioch, partially due to increasing pressure from the Turks of the
Danishmends. In 1100 Bohemund came to Gabriel's aid along with his cousin
Richard of Salerno and the Armenian bishops of
Marash and Antioch, but they were both captured and the bishops slain by
Danishmend Gazi, emir of
Sebastea, in the
Battle of Melitene. Malik was now constantly raiding Gabriel's territories. Fearing an imminent attack on the city itself, Gabriel asked for help from Baldwin of Boulogne who had recently become
king of Jerusalem, despite concerns that Baldwin might take over Melitene, as he did Edessa. Baldwin relieved the siege of Melitene after which Gabriel recognized him as overlord of the city. Beginning in 1103, the Danishmends again attacked Melitene. Gabriel asked the crusaders for support, but they did not send help because they were negotiating with the Danishmends emir at this time about the release of Bohemond. Melitene was conquered and Gabriel was captured. One of Gabriel's castles resisted the Turks. Gabriel was then taken to the fortress of Qatya which his wife was defending in order to make her surrender. Gabriel, however, refused and therefore he was killed, according to Michael the Syrian, by dogs. Byzantine seals bearing his name testify him as Gabriel,
protonobelissimos and doux of Melitene. ==Family==