Clelia looks like a typo for
Celia, which I prefer.
Cloelia seems to have started off as four syllables, with the -oe- becoming an -e- much leter. But it's a very ancient name, so nothing is clear. The famous swimming
Cloelia would be a glorious namesake!
In today's world, it would be perceived as a fake and frilly version of
Chloe, which I prefer.