Could Cleo be the perfect name for your baby girl? The baby girl name Cleo is 4 letters long, and contains 2 vowel(s) and 2 consonant(s). Cleo is a baby girl name that starts with the letter C and ends in the letter O. The baby girl name Cleo has a popularity of 12% and is ranked 885 in the list of top 1000 most popular baby girl names. If Cleo isn't the ideal name for your baby girl then take a look here for some randomly generated names. Hopefully you'll find a more suitable first name for your baby girl than Cleo!