An interesting pseudonym, "Aviarius" almost certainly borrows from "aviary," which, basically, is an enclosure for birds. Some certain intelligent persons have taken it further, insinuating that, perhaps, "aviary" is componential to "avarice," the name "Aviarius" being an amalgam of "aviary" and "avarice." Aviarius, being a rapacious, bird-themed villain, certainly relinquishes some degree of potential verity to this dual analysis, and while "aviary" is the backbone of the name, "avarice" may also play into it somewhat.
Confidence: 95