Late Roman Unit Sizes

[Nathan Ross]

Didn't Onur calculate the Perge Legion to be around 2000 strong, including the cavalry and supernumeraries, hence his belief it was a double strength legion?

In his 2017 paper in Gephyra Onur estimates that "the total number of men listed in the schedule is no less than 1550-1600" (p.197, abstract), although he does not give a calculation as to how he arrived at this figure.
 
He earlier says (p.187): "In any case, the legions of field armies contained between 1000-1200 men in the fourth century. The size of the unit in the inscription of Perge cannot be deduced because the last lines containing the numbers of munifices, perhaps clerici and deputati are deficient, missing or perhaps have been restored incorrectly by the editor. Even though the number of these is uncertain, the minimum total number is 1172. But this number should certainly be increased, since the last two digits -59 concerning munifices in the line 28 and its hundreds (perhaps even thousands too) should be considered within this total."

Assuming that there is only one missing digit for the hundreds - and not two for thousands of munifices! - the legion can be calculated as between 1272 and 2072 men.