A variant of "Katie
", or the case of some one being illogical and shortening names such as "Katelyn" and adding the "d" because they some how think it makes them cool
In many cases, the name was thought up because in all actuality, "Katie" is pronounced like "KAY - dee", in which case it really should be spelled 'Kadie'.
"Honey, let's not go with cliche, mispronounced names. Why don't we name our new baby Kadie?"
"Oh! How beautiful!"