Similar spellings with slight variations:
* Kaitlyn
* Katelyn
* Kaylynn
* Kailyn
* Kaylynne
Variations with different sounds:
* Kailin (pronounced "KAY-lin")
* Katelyn (pronounced "KAYT-lin")
* Kayleigh (pronounced "KAY-lee")
Other spellings:
* Cailyn
* Kailynn
The most appropriate spelling depends on personal preference and desired pronunciation.