Timberlake Wertenbaker's play 'The Ash Girl' is an adaptation of which classic story?

This question brings up a good point, we'll maybe, no one calls their kid Rapunzel anymore. Why?

I would hope that any “doyenne playwright “ might actually be creating original works not just rehashing work that is centuries old. But I suppose the original authors won’t be suing for breach of copyright. ©️