Majorian was probably born after 420, as in 458 he is defined as a iuvenis, a "young man".He belonged to the military aristocracy of the Roman Empire.As the powerful magister militum Aetius realised that this marriage would weaken his position, he sent Majorian away from his staff to private life, thus hindering the marriage.There was a narrow passage at the junction of two ways, and a road crossed both the village of Helena... [Aëtius] was posted at the cross-roads while Majorian warred as a mounted man close to the bridge itself...The most important sources are the chronicles that cover the second half of the 5th century — those of Hydatius and Marcellinus Comes, as well as the fragments of Priscus and John of Antioch.
As regards his policy, twelve of his laws have been preserved: the so-called Novellae Maioriani were included in the Breviarium that was compiled for the Visigothic king Alaric II in 506, and help to understand the problems that pressed Majorian's government.
Having Majorian as son-in-law would have strengthened Valentinian in the face of other powerful generals and would have solved the problem of the succession.
Furthermore, as Emperor, Majorian could have led the army himself, freed from the dangerous bond with a powerful general, such as Valentinian had been obliged to contract with Aetius.
He therefore opposed Valentinian's plan, and put an end to Majorian's military career, expelling him from his staff and sending him to his country estate.
It was only in 454 that Majorian was able to return to public life.
His grandfather of the same name reached the rank of magister militum under Emperor Theodosius I and, as commander-in-chief of the Illyrian army, was present at his coronation at Sirmium in 379.