Board Thread:Questions and Answers/@comment-2.218.215.241-20131020132815/@comment-76.69.79.67-20170228100123

Forget to mention, the actual reference being made in this case is to Egill Skallagrimsson. It's intentional.

That's incorrect, A is pronounced as A, LMGTTFY: Google Translate.

However, it's not even the pronounciation you should be concerned with, but the original manga/source for his romanji username. There is not 'official' source for Agil, as the anime was made by a separate production team who may have assumed that was the case.

Furthermore, it's only Kirito's name which is a portmanteau of his first/last names. Asuna is not. Neither are Leafa, Recon, Heathcliff, Oberon, Klein Silica... eh, I'll just stop here, because none of them are in fact, disproving that hypothesis.