Mithridates I of the Bosporus
In the aftermath of the Battle of Zela , Caesar made him king of the Bosporan Kingdom , by commanding him to declare war on his niece Dynamis and her husband Asander ( who were then the ruling monarchs ) to seize the kingship for himself . 
<triplet> Dynamis <subj> Asander <obj> spouse <triplet> Asander <subj> Dynamis <obj> spouse