Board Thread:Lore Discussion/@comment-2165692-20161018043733/@comment-30426281-20161106053350

It is entirely possible for these two dragons to be the same. While Nahfalaar was "last seen" 500 years apart from Nafalilargus's role in Redguard, "last seen" does not mean "dead". His article explicitly states that Nahfalaar escaped alive.

There is no explicit reason why Nahfalaar could not have hidden out in a remote place like Akavir (literally the land of dragons and largely unknown to the Empire et al) for 500 years and/or taken on another unknown name before being known as Nafalilargus.

All he would have had to do is remain more discrete in his dealings with mortals and he could continue to find board & protection without ever being discovered, thus never being heard from again.