Had I read this before this lunchtime, sjm, I would have pointed out that Arachne pre-dated saints and sainthood by a few centuries.
HOWEVER - I hosted a lecture this lunchtime on Saints, Sanctity and Satan where the excellent lecturer, a retired united Reform Church minister, traced the antecedents of sainthood as far back as Imhotep and hinted that only lack of time had prevented him from taking the idea back even earlier.

So - here's to St.Arachne, patron saint of us all!