Millie Hopgood
A young Witch from Slice, Millie Hopgood is mentioned as a possible replacement for the dead witch Desiderata Hollow at a Witches' Sabbat in Witches Abroad. She's described (by Gammer Beavis) as hard-working, but with an even worse squint than Magrat Garlick (the previous suggestion for Desiderata's replacement).