Can you think of any names that have at least three nicknames? That is, three nicknames without too much stretching and I would probably count one nickname and that nickname plus y as only one.
On my own, I can think of:
Margaret: Maggie, Peggy, Madge, Midge, Margie, Meg
Elizabeth: Eliza, Liza, Liz, Libby, Beth, Bess, Betty
Katharine: Kay, Kathy, Kat, Kitty, Kate
Robert: Rob, Bob, Hob, Robin
Richard: Rick, Ritchie, Dick
William: Will, Bill, Liam
What others can you think of?