There is the singer
Ciara so that would probably influence the prn. Most would say the C like an S. And I know you don't like
Keira, because of the I before E rule, but really the I is prn like a Y as in KEYR-ah. Like a Key sound almost. I'm afraid
Kyra would get KY-rah because most people would associate it with
Tyra, as in
Tyra Banks.
My best friend has a niece named
Kiara (KEY-air-ah) and to me
Kiera looks like that name. The only
Kira I have actually met spelled it
Kira. So I'm afraid you would constantly be correcting people on prn if you went with any of the spellings you like. You may have to decide which is more important to you: the spelling or the prn?? But out of your choices the one that I would prn KEER-ah is
Keira ( I know, you one you don't like!:( ) I hope some of my rambling helps!!!