It is not a Gaelic word. Gaelic has no K.
Yes, Kira does mean the sun in Persian. However, in other languages it means different things. In Latin it means light and in Celtic/Gaelic it means dark lady.
In Greek, kira means lady of the sun, and in Japanese it means glitter or sparkles.
dark is Gaelic/Celtic and killer is from the anime death note and that is just how killer is pronounced in Japanese
I am Kira.
light;bright light
it dose not mean killer cause my name is kira dose anybody have any in comen
Kira means "count (numbers)" in Malay.
The name Kira is of Greek origin and it means "lordly" or "ruler". It can also mean "sparkling" or "radiant" in Russian.
Glitter
Rebekah is not a Gaelic name and therefore doesn't mean anything in Gaelic.
It means 'killer' in Japanese i guess i know from watching Death Note!
There is no Gaelic form of the name, if that's what you mean.