haha, yeah - the first thing I thought of when I saw the name was asoiaf's Tyrion Lannister.
I like the first sylablle well enough for either gender, but the -ion ending seems masculin to me, calling to mind names like
Hadrian and
Fabien. Though I understand that ending is pretty popular for feminine names, too -
Adrienne, anyone? Hmmm, now I'm playing the "create you own spelling" game. Maybe I'd be more open to Tirion if it was spelled, say, Tirienne or Tyrienne, but who knows? For now, I'm in the "it seems like a boys name" camp.
I love the other names here, though! If I spontaneously birthed a girl child,
Tamsin would be a strong contender for her name, and I'm fond of
Elspeth, too.