I don't live in N.
America, so I don't know what pronunciation you would be more likely to get.
I like
Ciara best, followed by
Kiera and the
Keira. Maybe
Keira Knightley would influence people into pronouncing
Kiera /
Keira right?
Kyra I don't see as KEER-a at all, and I don't like
Kira or
Keara in the slightest. LOL at I before E except after C though, you've obviously had it drummed into you!
I like
Ciaran /
Kieran as well, and think it goes well with
Finlay and
Rowan, although it might look a bit odd if all the names are so obviously Irish-themed except for
Rowan.