Could Isaac be the perfect name for your baby boy? The baby boy name Isaac is 5 letters long, and contains 3 vowel(s) and 2 consonant(s). Isaac is a baby boy name that starts with the letter I and ends in the letter C. The baby boy name Isaac has a popularity of 96% and is ranked 42 in the list of top 1000 most popular baby boy names. If Isaac isn't the ideal name for your baby boy then take a look here for some randomly generated names. Hopefully you'll find a more suitable first name for your baby boy than Isaac!