Gabriel of Melitene was the ruler of Melitene. Along with Thoros of Edessa, Gabriel was a former officer of Philaretos Brachamios. Philaretos had installed Gabriel as the ruler of Melitene. Following the death of Philaretos in 1086 Melitene became completely independent of Byzantine control with the aid of the Danishmends. Eventually the Danishmends began harassing Melitene. Gabriel appealed to Bohemund I of Antioch for assistance. 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 and rescued Bohemund after which Gabriel recognized him as overlord of the city. Some sources state that Gabriel's wife was a daughter of Constantine I, Prince of Armenia; however, the dates simply do not allow for it. The confusion appears to stem from identifying Thoros I, son of Constantine with Thoros of Edessa, the latter of whom Gabriel is attested as being the father-in-law. Gabriel must have had some connection to the Greek culture, either via his mother or wife and, if that connection was to the family of Constantine I, it was most likely further back. His wife may have been a daughter of Constantine's father Roupen, for example; or she may have been a daughter of Philaretos, the general under whom Gabriel served, but this is only speculation. In any case, he was presumably known by his contemporaries and subjects to be descended from a prominent family that was acceptable to both the Greeks and to the Armenians, which could suggest a mixed heritage. Gabriel was disliked by a number of his subjects for his Eastern Orthodox faith. In 1101 Baldwin of Bourcq married Gabriel's daughter Morphia of Melitene, who later became Queen of Jerusalem. Gabriel, who was reputedly very wealthy, gave 50,000 gold bezants as a dowry. William of Tyre described Gabriel as Greek by religion, Armenian by race, language and custom. Byzantine seals bearing his name testify him as Gabriel, protonobelissimos and doux of Melitene. 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 forced to give the crew of the castle the order to surrender. However, the garrison disobeyed his orders, and he was executed by soldiers of the sultan under the walls of the castle.