Rank of a Centurian in the Auxilla

[LonginusXXI]

The only title I have is centurio princeps which is either the grade of the second or third centurian in the Legion. 

I've always thought it was centurio princeps, whether the cohort was quingenary or milliary. The difference with the legion ranks being, presumably, that the auxiliary centuries were not graded as hastati etc.

However, I've had a look through the epigraphy database and this exact rank doesn't seem to be listed anywhere! The closest matches I could find are these:


EDCS-31100168 (Eining): Felicis]sim[o princ(ipi)] / [co]h(ors) III [Brit(annorum)

AE 1968, 00436 (Zemun): Aur(elius) Pro/pincus pri(nceps) / co(ho)r(tis) pri(mae) Ca/mpanorum


So it looks like plain princeps or principes was an auxiliary rank, although there's no actual indication that these men were centurions, let alone leading ones...

It would be interesting to know if this is supported anywhere else.

I just started a thread on citizen cohorts.