I like both of them. I'd choose
Rachel because it's a family name, and I like the stories of the family Rachels, who were both skilled craftswomen.
I know a lot of Rachels and several Rebeccas / Rebecas. They're all toodifferent for me to have a '
Rachel impression' and a '
Rebecca impression', but the Rebeccas are various ages & all the Rachels are over 25, and the Rebeccas are all white and the Rachels aren't.