Julius Marinus
Julius Marinus was the father of Roman Emperor Philip the Arab and Philip's brother Gaius Julius Priscus . 
<triplet> Philip the Arab <subj> Julius Marinus <obj> father <subj> Gaius Julius Priscus <obj> sibling <triplet> Gaius Julius Priscus <subj> Julius Marinus <obj> father <subj> Philip the Arab <obj> sibling