spelling question - which would you use?

[horatiopants.livejournal.com]

My partner and I are having a spelling debate on a name for our soon-to-be-born baby. 

Clio, or Cleo? It would be pronounced KLEE-oh. 

Argument for Clio: more traditional spelling
Argument for Cleo: more common US spelling

For what it's worth, initials would be CMP and the last name is eastern European. We both have pretty well-mixed heritages. 

ETA: We live in the US

Not going to use it, but thought it was worth a mention.

[ladydreamfire.livejournal.com]

We're good on names, but I just recently started catching a few episode of The Borgias and am I the only one who was confused about Ceasare being pronounced as Chess-er-ray?? I saw See-zer like Julius Ceasar.

And am I the only one it actually grew on? I almost want to use it....but not quite.

Also, I still think Lucretzia is a neat name.

What do you think of Ceasare?