Could Katelyn be the perfect name for your baby girl? The baby girl name Katelyn is 7 letters long, and contains 2 vowel(s) and 5 consonant(s). Katelyn is a baby girl name that starts with the letter K and ends in the letter N. The baby girl name Katelyn has a popularity of 32% and is ranked 681 in the list of top 1000 most popular baby girl names. If Katelyn 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 Katelyn!