I’ve said it before, but… as long as you (and presumably your daughter) are ok saying, “[name]Clea[/name]. C-L-E-A” for the rest of your lives, it IS a lovely name; I’m fond of the classic Greek ones as well.
Allllso, if you have to type “pronounced clay-uh” in your question, you’re going to be correcting folks (teachers first day of school, the receptionist at your pediatrician’s office, etc) who say “clee-uh.” the more common name, [name]Cleo[/name], is of course “clee-oh” so the default assumption (I would guess…we’ll see what others say!) would be “Oh, it’s [name]Cleo[/name] w/ an A”
for middle names, I’d go w/ anything that starts strong. for some reason first thing I thought of was [name]Clea[/name] [name]Michelle[/name] (even tho’ [name]Michelle[/name] might be too 70s/80s vintage… no offense to Michelles out there… our First Lady…one of my best friends, etc etc!).
but you wouldn’t want [name]Clea[/name] [name]Adelaide[/name] or [name]Clea[/name] [name]Eudora[/name] or seomthing since any vowel sound is going to blur into the end of [name]Clea[/name], I think. also avoid say, [name]Clea[/name] [name]Lily[/name]… too many Ls there, and any MN that si soft won’t work as well as one that kind of picks the end of [name]Clea[/name] up and gives it a little pop. [name]Clea[/name] [name]Matilda[/name]? start w/ a hard consonant sound, i say!