Kennedy is O-U-T-spells-out: not just a ln but the ln of an excessively prominent family; a bit like naming a child
Elvis ane protesting that you never gave the singer a thought.
Kendall: beautiful surroundings and all that, but another lnfn and the only one I've ever met was a male. So, two strikes and it's out.
Which leaves us with
Katrina. It's no better than OK, but it's the best on offer.