Could Jillian be the perfect name for your baby girl? The baby girl name Jillian is 7 letters long, and contains 3 vowel(s) and 4 consonant(s). Jillian is a baby girl name that starts with the letter J and ends in the letter N. The baby girl name Jillian has a popularity of 4% and is ranked 961 in the list of top 1000 most popular baby girl names. If Jillian 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 Jillian!