Valentinian begat Valens, Gratian and Valentinian II. In the chart above I list which reverses are usually found on the coins of which Emperor.
It isn’t at all conclusive, but I hope it will help.
The skills I’ve picked up from cleaning a few thousand of these little bronze nuggets find their only useful outlet there, and my ego benefits greatly from having student after student come up with a coin they considered an unidentifiable slug and return to their friends with an attribution as to type or emperor. The constantly repeated question is “How do you do it?
” My less-than-helpful answer is always “pattern-matching”.
Julian lasted only two years before dying while campaigning against the Persians, and this tedious series of Constantines came to an end.