Possibly doesn’t matter what she calls it, word will get round if she does a good job, is dependable, honest (timescales, turning up etc) and doesn’t juggle jobs. However, it’s probably a fine art, pricing yourself so that you have a good regular income, but not descending into juggling lots of jobs and pissing everyone off.
In answer to your question tho, in some parts of the country it probably won’t raise an eyebrow, in others it might. However IMO go with something more bland that doesn’t have any potential to turn people off. If she wants more quality higher paying jobs, it might well be a barrier, ie she might devalue herself workwise in some quarters with outdated ‘bird’ stuff. Shirley if she just uses her name in the business title everyone will know she’s a bird (and it won’t potentially alienate any er…. PC sensitive customer).