Thanks for the reply Dastgir, but I wanted to know how is determined the AegisName for official items in general, not only for implement new gears, but also to know why are differences with rAthena in some cases.
In example, this is the AegisName for Orc Baby Card (4375) :
Many of them are from Aegis(the name Official Servers used internally), however for new items, we don't have aegis, so that's just made similar to the name (and edited a little), such that 2 AegisName shouldn't conflict