I had the same problem as you a few years ago. I always liked
Jessie. To me
Jessie is a charming, old fashioned name that it underused. I know there are lots of Jessicas around, but the ones I knew/know always either went by
Jessica or
Jess so it seems underused to me. It just reminds me of the early 1900s, I would put it in the same category as
Virginia or
Mabel.
I also don't care for
Jessica.
Jessamine is cute but it doesn't work well where I live and
Jessa is very
Jessa Duggar.
How about:
Jessamy
Jesslyn
Jessenia
Jean nn
Jessie just doesn't work anymore. I considered all of these full names and in the end decided I would go with just plain
Jessie. It is a bit nickname-ish but not like
Fifi or Dodo or something so I think it works just fine.
Jessie Rose was my favorite, but I love
Rose in general.