The Maskerade reference is definite, but I also have an uneasy feeling that there are other references, more than one, to Ezeriel, scattered around the books.
I'm sure there's reference made to her somewhere as a Discworld Queen Cleopatra character, soaking up the bath of asses' milk, and smelling faintly of cheese to all her potential suitors - although Pyramids seems logical, it doesn't seem to be in here... and elsewhere, getting up to terminal hi-jinks with an asp... (Mort?) (Yes, a little past the middle. --Old Dickens 14:23, 28 December 2007 (CET))
--AgProv 10:47, 28 December 2007 (CET)