On first glance, I'd pronounce it like
Ellery, but if I think about it, I'd correct it and say eh-LEH-ree. Either way, I love it! As a matter of fact, it's on my favorites list :) You have great taste.
I agree with
Miriam. It just is too... well, like you said, serious.
Eleri Katharine is pretty good, although I think that
Katherine & variants are used too much. I still like it though -- I can make exceptions. ;)