Cady, but really, I don't think it's a name.

youre goign off a twist on katie right? It's cool. I would be afriad of mispronounciations and misspellings. Twists on names can be hard on kids or easier on them. katie is a common name and Cady, Cadie etc are less common. You could avoid misprounounciations with Caydie or something.

i like Cadi, its different the spelling looks nice and all, i dont know it just looks pretty lol i think spelling it Cady is a little more common to use to re-spell Katie because of the movie mean girls, thats how the girl named Katie spelt it C-a-d-y.

Um, where did "Katie" come from? How are Cady and Katie pronounced the same? T and D are not the same thing.