As Emperor , Hadrian treated Servianus with distinguished honor , considering him to be his first successor .
When Trajan died on August 8 , 117 , his cousin and adopted son Hadrian became emperor .
As Emperor , son treated Servianus with distinguished honor , considering Hadrian to be his first son .
When Trajan died on August 8 , 117 , his cousin and adopted son Hadrian became emperor .