His elder brother Amalric died in 1304, and Rupen succeeded him as titular Lord of Toron. In 1308, Rupen was involved in the abortive rebellion against Amalric, Prince of Tyre, who had usurped the royal power in Cyprus. He then left Cyprus to support his mother Eschive in an unsuccessful attempt to claim the Duchy of Athens, and took refuge from Prince Amalric on Rhodes. After the death of Amalric, Rupen returned to Cyprus and testified in the trial of the Knights Templar in 1311.
