So we have Miller, we chose it not only because it's uncommon but because it's my FIL's middle name. We also have Ottilie which is pronounced like Ophelia but with T's which was my Nan's name. We have exhausted immediate family names as middle names so have a completely clean slate.
For a girl my top name is Vesper, possibly Melody or Summer. For a boy I have nothing. We want something that's not in the top 100 names, something uncommon but not made up or weird.