elected the first Latin King of Armenian Cilicia of the Lusignan dynasty, ruling from 1342 until his death in 1344.
He was made Governor of Serres in 1328 and until 1341. When his cousin Leo IV , the last Hethumid monarch of Cilicia, was murdered by the barons, the crown was offered to his younger brother John , who urged Guy to accept it. Guy was reluctant - his mother and two of his brothers had been murdered by the Armenian regent Oshin of Corycos - but he eventually accepted and took the name Constantine.
Guy was killed or murdered in an uprising in Armenia on April 17, 1344 and was succeeded by a distant cousin, Constantine V