Constantine the Great

The succession of Constantine was assumed by his three sons, Constantine II, Constantius and Constans.

An excerpt from the article 18 facts about Constantine the Great

There were other contenders for the succession, but they were slaughtered. With the remaining contenders gone, the army swore allegiance to Constantine's sons, who in September 337, at a meeting in Pannonia, divided the empire among themselves and assumed the titles of Augustus.