Julian, epistula ad Athenienses 270C (3.5-8, p. 215, Bidez): Six of my (i.e. Julian’s) cousins and his, and my father who was his own uncle and also another uncle of both of us on the father’s side (i.e. Dalmatius Caesar) he put to death without a trial1…

(Wright, ii, p. 249) Zosimus II, 40, 3: Then, in order to proceed against his relatives, he

(Constantius) killed Hannibalianus and commanded his soldiers to cry aloud that they had no other commanders than the sons of Constantine.