Oh, I definitely agree about it being an excuse. It simply doesn't make any sense as a 'variation'. I don't see how you'd get
Kaylin out of Kalila/Khalilah (I can't handle all those extra H's! I come from a strictly non-H family!).
Kaylin is most likely simply
Kaylee with
Lynn tacked on (rather like Kimberlin and Amberlyn, thus) or is
Kay +
Lynn.
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