Could Rosalyn be the perfect name for your baby girl? The baby girl name Rosalyn is 7 letters long, and contains 2 vowel(s) and 5 consonant(s). Rosalyn is a baby girl name that starts with the letter R and ends in the letter N. The baby girl name Rosalyn has a popularity of 16% and is ranked 843 in the list of top 1000 most popular baby girl names. If Rosalyn 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 Rosalyn!