We've chosen to call DD, due in December, Catherine. No particular reason other than we love the name, but we cannot find a middle name to go with it that grabs us in the same way.
We had the same issue with DS, but then he was born on St Patrick's Day and as DH's name is Patrick and FIL has Irish parents and was pushing us to include an Irish name, it seemed perfect.
I'd like DD to have an Irish based middle name too but the only one I can find which I think is pretty is Aiofe (Pronounced Ee-fa) but DH isn't keen. We've also toyed with Catherine Emily and Catherine Elizabeth but obviously they're not Irish.
It wouldn't be the end of the world if we chose a non-irish middle name, the most important thing is that we find something pretty that we love...
Any help would be very much appreciated.