Could Trinity be the perfect name for your baby girl? The baby girl name Trinity is 7 letters long, and contains 2 vowel(s) and 5 consonant(s). Trinity is a baby girl name that starts with the letter T and ends in the letter Y. The baby girl name Trinity has a popularity of 77% and is ranked 228 in the list of top 1000 most popular baby girl names. If Trinity 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 Trinity!