I like the names a lot!
And yeah, I'm a Red Sox fan, but the girl name appeals just on its aesthetic merits, as well.
I see what Ilaria pointed out, but I find it to be less "rhymey" and more a matter of a pleasing symmetry.
And truth be told, I hear more of the rhyme or similarity between the "-wyn" and "Fen-" syllables, anyway, but there's no double letters that lead to a trip of the tongue when saying the two names in succession. And the "-way" sort of leads out of it with a freshness and lift. (This is my cumbersome analysis after just feeling like it had a nice lilt & pleasing sound....analyzing why.)
I had a little bit of the "do we really want to do this" feeling when naming my first child. It was a family name, but one nobody has heard of (well, almost nobody--very few people have heard the name before we mention it though one congregation at a church we visited did not bat an eye when they heard her name, because I guess one of their stalwart parishioners from years ago---her daughter is an elderly member now---had the same name.) It's easy to say and spell, but just not familiar. And it has a cutesy or spunky sort of sound, and while I was infatuated with the idea of using the name, I just wasn't sure. Were we just infatuated with being "different"? What if she wasn't a free spirit or a strongly individualistic person? What if she was a quiet, thoughtful introvert? What if she couldn't "pull it off" and the name was a burden, or an awkward fit?
We sat on it for awhile before finally filling in the birth certificate and committing to the name. It was the name that sang for us, in spite of the slight misgivings or giddy "are we really doing this?" feelings. She has made the name her own (she's just four) and is her own combination of contemplative observer (reserved) and confident individualist, and the name seems to work.
I encourage you to feel out whether this really is the name you love, and if it is, to commit to it with confidence in spite of what the in-laws think. Consider if their knee-jerk reactions even feel valid to you, or just closed, and consider whether you want that to influence your decision. I think it's okay (and probably a good idea) to second-guess yourselves and feel out whether it's novelty/rebellion or a real draw to the name. All part of the process!
