I think it's unlikely Kenleigh,
Kayleigh and
Kelsey are honouring. How much better imho would these be, and they'd fit so much better with
Kirsten:
Katharine or
KatherineKerenKeturahKezia
I like the middle names, though. Would have gone with
Susannah instead of
Sue myself because I prefer full names, but
Kirsten Sue works well.