While Postumius Varus was a third-century member of the gens Postumii, he was not descended from the Republican family of the same name.
Birley notes Postumius Varus had a brother or cousin, Titus Flavius Postumius Titianus (consul ordinarius 301), whose name implies a link with the family of the emperor Pertinax's wife, Flavia Titiana, although Birley admits "these names were common.
"[1] Postumius Varus' first recorded posting was during the 240s as Legatus legionis of the Legio II Augusta, which was stationed in Britannia Inferior.
He was put under pressure when riots erupted in the city, and had to rally the urban cohorts to defend Aurelian's rule while the emperor was campaigning against the Iuthungi.
[4] During his career, Postumius Varus held two priesthoods, the Augurship and membership in the Quindecimviri sacris faciundis.