This is a fun thread!!
Ralph Syracuse: Ralphie, Orangeman, Ralph the nut, Roo, Ralph a Roo
Norton: The Offical Furcaster, Nortie, the Liberace of the Campbell cats(from the vet), Nortietrack, Nortiestar, the Brick(immovable when "sharing" space in the bed
Molly: Molly Meu, Meusky, little girl
Tina Peepers: Peeps, Peepers,
Raven: Princess, Ravie Gravey
Nicholas: Nick at nite
Riley: Riley Diley
Hayley; Hayley Girl

The older cats that have been with us the longest seem to have the most names!! And they KNOW who they are and will come when called(well, most of the times, they ARE cats!!)