Help with girl middle names?

Sorry, but Kaidyn is a terrible name for a person. The spelling may be 'unique' but the name isn't - changing the spelling doesn't change its sound. It looks immature and tacky and it's only going to be a burden for her in the future - for example, who's an employer more likely to prefer Kaidyn or Katherine? I'll bet Katherine. Prejudice isn't nice, but it's a fact of life.