My BFF growing up was Katelyn and I like that spelling. But of the three you mention, I think I see Kaitlyn the most, and I like that too. I dislike that third option for some reason.
I'm a Caitlin. That was the most popular spelling for a while and is the closest to the Irish (though with a different pronunciation), but in 2011 the most popular spellings were:
I'm also a Caitlin. I like my name and vastly prefer the traditional spelling, but it does get misspelled. A lot. Usually with either a K or a Y...or both, lol. That said, it doesn't bother me and I wouldn't discount the name because of it.
Re: How do you spell...
I'm a Caitlin. That was the most popular spelling for a while and is the closest to the Irish (though with a different pronunciation), but in 2011 the most popular spellings were:
Kaitlyn (2893)
Katelyn (2826)
Caitlyn (926)
K
Baby Name Popularity by State
"Life isn't about waiting for the storm to be over, it's about learning how to dance in the rain." -Unknown
Married 3-1-08 | Nathan 11-24-08 | Kaelyn 11-30-10 | Alicia 8-17-13
I think Caitlin looks best.
If it must start with a K, then Kaitlin. The 'add a y to everything' trend turns me off from Kaitlyn.
Zoe Nicole: 8/21/14
Due again: 1/17/18