I could do that, meridianrose or Meridian Rose, though I don't tend to; good idea though! I like the stories behind your three names having different meanings even if the vidding name is a bit due to ageism which I think there's more of in some quarters these days (*cough*tumblr*cough*) even while fandom as a whole has become a bit more mainstream and marginally more acceptable for all ages.
Yes, AO3 should really let you have 2 different (unlinked) accounts without needing another invite and email - I have 2 accounts now, one for fannish works, one for 'professional' fic eg fairytale retellings and other acceptable as fanwork originals. But I'd like to have an extra fannish option; it's that or anon and sometimes I'd like a third option!

I have learnt something today thanks to your moire pattern link, thank you :)