I like Keira and i would speek Kyah that way, i think its also a nice name and not too common.
instead of Tayla what about Tylah?? that was doing to be ds1 or ds2 name had they have been a girl.
I do like that spelling of Kyah, in fact I prefer it to Kaya. Thanks We both liked Tylah but my best friends son is Tyler so it's a no-no for us.