Could Siena be the perfect name for your baby girl? The baby girl name Siena is 5 letters long, and contains 3 vowel(s) and 2 consonant(s). Siena is a baby girl name that starts with the letter S and ends in the letter A. The baby girl name Siena has a popularity of 28% and is ranked 720 in the list of top 1000 most popular baby girl names. If Siena 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 Siena!