Usernames you might have used?

[Angrboda]

If it weren't rather obscure, I might choose Boru's choice of a new name for me, Angrboða, which, as Wikipedia explains, "In Norse mythology, Angrboða or Angrboda (Old Norse "the one who brings grief" or "she-who-offers-sorrow") is a female jötunn (giantess). In the Poetic Edda, Angrboða is mentioned only in Völuspá hin skamma (found in Hyndluljóð) as the mother of Fenrir by Loki. However, in the Prose Edda book Gylfaginning, she is referred to as a "giantess in Jötunheimr" and said also to be the mother of Fenrir's siblings Jörmungandr (the Midgard Serpent) and Hel."

Then again, I might just choose it for its obscurity. It would be an appealing choice for use on a religious forum.