Could Jacob be the perfect name for your baby boy? The baby boy name Jacob is 5 letters long, and contains 2 vowel(s) and 3 consonant(s). Jacob is a baby boy name that starts with the letter J and ends in the letter B. The baby boy name Jacob has a popularity of 99% and is ranked 15 in the list of top 1000 most popular baby boy names. If Jacob 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 Jacob!