My parents had narrowed it down to four girls names. I don't know why they picked the one they did, but I'm glad they did as it's the least common of the four. It's still a perfectly normal name, and most people in the Commonwealth countries would've heard of it. It went out of fashion for a while, but I do hear the occasional young person with it nowadays. I get a kick out of seeing the creative spellings people in the US come up with for it when I visit and they need to write it down on orders or whatever. (On the flipside, my sister's name is rather unusual here, but perfectly common in the US).
Stephanie, Jackie and Megan were the other three contenders. I don't like the name Jackie so am glad they didn't pic that one. Stephanie got ruled out as my aunt and uncle had a baby boy called Steven a few months before I was born, so my mother decided that she couldn't have two cousins born so close with similar names. I thought that was ridiculous - if I had my heart set on a name I'd use it regardless of how many other people in the family had the same or a similar name.
My middle name is after my maternal grandmother. She only ever went by her middle name, or a derivative of it. My middle name is the derivative, which is a perfectly legal name on its own. I love my grandmother very much, but have always hated my middle name as (1) it's a unisex name (something I absolutely hate with a passion); and (2) it's only three letters long, two of which are the same letter, so it just looks so dull.