 When Valentinian was less than two years old, Honorius appointed Constantius co-emperor, a position he would hold until his death seven months later.As a result of all these family ties, Valentinian was the son, grandson, great-grandson, cousin, and nephew (twice over) of Roman Emperors.In either 421 or 423, Valentinian was given the title of Nobilissimus by Honorius, but which was not initially recognized in the eastern court of Theodosius II.