AE 1981 777

[Nathan Ross]

Isn't centenarius here a reference to Valerianus' (notional) pay grade/equestrian status rather than his military rank? Cp. Flavius Baudio as ducenarius protector (ILS 2777).

Wouldn't he need to be a centenarius procurator, in that case? Sexagenarius, Centenarius and Ducenarius were used to differentiate procuratorial grades within the equestrian hierarchy, based on their annual pay in thousands of sesterces, but as far as I know the word by itself wouldn't mean anything in that context. Or would it?

I believe that the ducenarius might have been an actual rank within the corps of protectores (who didn't have centurions, obviously, as most of their members were former centurions anyway!). Thus similar to the scholae and later auxilia palatina of the imperial comitatus.