What's in a name?

Have you ever had a friend who told you that their name, the one you know them by, is not actually their name? And then when you try to think of them as the other name, it just doesn't fit? It happens all the time; people go by their middle name instead of their given first name, or take a nick name on as their moniker. We did that to our son too. We gave him my father's name, but decided to use his middle name. Once you know people by one name, it's hard to think of them as another. 

I think it's the same for books. Since I decided to embark on this self publishing journey (the word journey sounds so cliche, no? Perhaps ordeal will be more appropriate. I'll let you know). I've been wrestling with the decision to rename my book. You see, there are two other (and maybe more) novels that go by the name Unbound. I don't believe any of them are so well known that it precludes my use of the name*, not like if I was stuck on the name Twilight, but I worry that it will muddy the waters. Those who are rabid fans of Stephenie Meyers may know that Twilight was originally called Forks. In an alternate universe does this mean Twihards would be known as Forkers? 

It's just that I can't seem to find another name that fits as well for me. It's been the name for almost four years now and well, I'm having a hard time making the shift. If I had an editor or agent insisting on it, I'm sure I'd manage to get used to it. But when I have to rely on my own gut, Unbound can only be called Unbound. I'd gone as far as to title the second (in progress) and third books in the series too. So maybe, I leave it as it is and wait to see what happens. 

*please accept my apologies if I'm wrong. I'm sure these are fine books written by fine authors.