I wouldn't have changed the name. First time I heard about Qira, but my reaction was more along the lines of "what a coincidence". By naming your toon Qira, you obviously didn't mean to make a statement for or against the events that took place in this village.

In most languages, some words and names sooner or later become tainted by particularly bad individuals or groups. I'm German and pretty well aware of the evil things the Nazis did in the 1930s and 1940s. Overall, Germans tend to have a problem distinguishing between words and the meanings they receive in specific contexts.

Last Sunday, a big talk show on German TV debated if committing suicide is right or wrong. One guest brought up the fact that euthanasia was legal in the Netherlands, and the talk master immediately bunched up her panties because the Nazis used the term euthanasia for something that absolutely did not mean a good death to their victims. So, is it okay to use a word that has meant something evil in a different context, even though you mean to use it in a decent, objective, non-offensive context? Is it necessary to strike words from the vocabularies of not only one but all languages, make it taboo for future use, even if its use does not condone nor justify evil deeds done under the same name? I don't think so. (Oddly enough, no one will try to burn you at the stake for naming your kid Adolf, so names are apparently exempt from my fellow Germans' hysteria.)

You could have kept Qira and appreciate that the name meant something specific to a group of people. If it had been something that's more unlikely to be chosen at random, like "Reichskristallnacht", I would have probably asked you to have the name changed if you'd crossed my path. But something short like Qira which doesn't seem like a meaningful word to many English speakers looks just fine, and now that you know what Qira can imply, you have the means to explain it and the fact that it's a coincidence to the few people who'd ask you about it in-game.