I've had the name Herlève (pronounced er-LEV) on my mind for a while. It's a medieval French feminine name (William the Conqueror's mother was called Herlève), and I think it's quite sophisticated. In my opinion, Herlève and Isabeau would make a good sibset.
However, I really don't like the way people would mispronounce it as hur-leev, or something like that, but I wouldn't want to change the spelling in case it cheapens the name. I mean, French names are meant to look French, aren't they?
Do you like the name Herlève? Can you think of any middle names for it?