Just a google search for the word will show it is a place name in several locations, and girls name in some cultures. Does not mean you cant use it. What are the chances that a far away culture on a different world might not put those same two syllables together. Seems like it could happen to me.
A general rule, if the question of if something has been done/used before comes up. The answer is always yes. But unless there are trademarks and other legal things in the way, there's no reason you can't use it in your work.
Without even googling, I can tell you in Star Trek DS9, there's a main character named Kira Nerys.