Marcellus was the son of Vigilantia , the sister of Justinian , and Dulcidio ( or Dulcissimus ) , and thus the brother of Justin II and Praejecta .
Head entity: vigilantia Q7928931 5
Tail entity: praejecta Q7237531 27
Relation (head \u2192 tail): P40
Inverse relation (tail \u2192 head): P25