Sophia the Thunder Mistress was a random name given to me by a friend in a fit of silliness. I approved of it and it stuck. Now I seem to be Sophia everywhere (or Sophe, Sophs, Sophedreams...). Not that I mind. I fancy her as a helper of Manwe's (I considered "Maia of Manwe" for a pt), even though her name's not in the right language.
My real life name is Sara, a name that far too many of us share. It means princess and could probably be best translated "Arwen"
I've also seen it translated "Aredhel", which is slightly better, though I'm not an elf.
Sophia