I had no idea there were so many alternatives. Just too many witty people in the world, I guess. The alternatives on my list that haven't been covered by Bridget or by tsuwm's Cockney website reference are:

E for Adam (Eve or Adam)
K for Ancis (Kaye Francis)
N for a Dig ("infra dig", beneath one's dignity)
S for Williams (Esther Williams)
U for Mism (euphemism)
Y for Heaven's Sake