Baby Name Dilemma!

Aargh, I can't make up my mind on a baby name!  It's hard to find another name that still fits the "old-fashionedness" of what I've already picked for my other three, so that they can still  have a long name and short name.  Oh, why does it have to be so complicated?

So here's what I have:

Isabel (I know it's popular) but it fits all of my criteria...It's a long version for Bella, Izzy or Belle, but the middle name doesn't quite work with it.  (Isabel -------Jade?).  Can that work?  Cause I really like something like Isabel Rochelle or something "prettier" I guess.  Not sure..

Giselle -  Also fits my criteria.  Nicknames would be Gigi, Ellie, or Ella.  Middle name, Jade?  Again having this problem.  Jade no worky.

Isabel Chaffin works better than Giselle Chaffin in my opinion, but does it really have to flow perfectly?

Then the last choice:

Mercy Jade- Love it cause it's different, but no nickname for Mercy..  But she could be called MJ.

And then there's my original pick, Scarlet, which I still love, but hate that it has no nickname.  That's what is holding me back with it.  I really don't want my daughter to be called "Scar."

Oh what to do?  What to do?

If you have any suggestions, please feel free to throw them out to me!