I say it KINE-wen. It's alright. I don't specifically like it, but since it makes me think of the character in How Green was my Valley, it feels a little sentimental. It does make me think of a girl with long blonde hair and a flowy white dress, which is a pretty image. I don't have any combos for it though, and can't really think of what I'd pair it with. Maybe something more traditional?
Ceinwen Elizabeth just popped into my head, which I know is sort of a cheater middle name, but hey, I like it in that combo. :)