I also think
Margot Gwendolyn, isemay,
Lilias, Isabeau and
Anthea (i know i just thought it went!) go best. Something old fashioned, too old fashioned, will make her sound like a frumpy old woman! Be warned. No Pearls, Ediths, Ruths, or
Phyllis recommended! In fact, most of the names on your list!!!
Lulu - noooooo, lol. Lyla?
Philomena?
Francesca?
Olivia?
Sienna? (
Patience, no.... verity? truth?)
It definitly goes with
Scarlet, theres a lovely subtle similarity between the two, and they both sound classy.