Are any of these on the table:
your surname or maiden name
your mother's fn or maiden name
your grandmothers' fns or maiden names
a female relative's fn or surname from your husband's family
I don't care very much about the flow of middle names, so I always look to family first. If not that, something that has meaning to you, like a place name or flower name that has special significance.
Random single-syllable names that are more uncommon than Grace/Rose:
Pearl, Faye, Fern, Eve, June, Ruth, Joy, Kate, Jane