Could Mercy be the perfect name for your baby girl? The baby girl name Mercy is 5 letters long, and contains 1 vowel(s) and 4 consonant(s). Mercy is a baby girl name that starts with the letter M and ends in the letter Y. The baby girl name Mercy has a popularity of 19% and is ranked 814 in the list of top 1000 most popular baby girl names. If Mercy 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 Mercy!