Nicknames for Isabella are Izzy (also spelled Izzie), Belle, Bella, Ella, Ellie,Sabbie, Sabby, Isa, Abelle, Abel, Sabel and Allie. Isabelle is not an appropriate nickname as it also is an entirely different name and why would you call your daughter that if you didn't call her Isabelle in the first place? It would probably be best not to be called Izzy as this often leads to Izzy Belly.
Isabella Gielniak goes by Bella.
Isabella Soric goes by Isi.
Isabella Sanchez goes by Bella.
Isabella Rosalee goes by Bella.
Isabella Jantz goes by Bella.
Isabella Iannuzzi goes by Bella.
Isabella Hoopes went by Hoopsie.
Isabella Albert goes by Izzy.
Isabella Amara goes by Izzy.
Isabella Culver goes by Bella.
Isabella DeCicco goes by Bella.
Isabella Columbus goes by Bella.