1. KEER-a
2.
Kiera- KEER-a or kee-ER-a,
Keira- KEER-a,
Ciara- I think it's KI-a-ra, but my first instinct is see-AR-a Kirra- Between KEER-a and KUR-a
Kyra- KEER-a.
3. I like
Kiera,
Kira, and
Kyra. (all prn. KEER-a)
4. Not too common
5. None
6. Yes, I would probably use it.
7.
Kaia Estella flows better.
Kira Estella is choppy, or something.
Kira neesa a "flowy" middle name, like
Kira Liane or something.