Okay, here is my list - not very long though

Lexi - Lexers, Lexer-mexers, mexers, hunny-bunny, Lexi-loo, Sexy Lexi, Mexer-wexer.... and whatever else might pop out of my mouth.

Sasha - Sash, Sasha-Masha, Mash (our favorite), Masha, Masha-washa

Maddie - Maddie-waddie, Madders, Mad-dog, Psycho, sneaky-butt, Maniac, Spaz, Spazola, FREAK!, Marion Jones (fastest runner on earth), faddie-maddie and plenty more depending on what she is doing!