King Leo
She was proclaimed queen under the regency of Adam of Baghras. But he was assassinated; and Constantine of Baberon (of the Hethumian family) was nominated as guardian. At this juncture, Raymond-Roupen, grandson of Roupen III (the elder brother of Isabella’s father, King Leo I) set up a claim to the throne of Cilicia; but he was defeated, captured, and executed.