The maid at Unseen University is called Ksandra, which puns on Troy’s Cassandra; but might also refer to Sandra being yet another typical ‘Tracey/Sharon’ sort of name in England.
Perhaps the fact that nobody can understand Ksandra (because she talks with her mouth full of clothes-pegs) is also an obscure reference to the classical Cassandra, daughter of Priam of Troy, whom the Gods gave the gift of prophecy and the curse of no-one believing a word she said.