Could Johnathan be the perfect name for your baby boy? The baby boy name Johnathan is 9 letters long, and contains 3 vowel(s) and 6 consonant(s). Johnathan is a baby boy name that starts with the letter J and ends in the letter N. The baby boy name Johnathan has a popularity of 58% and is ranked 418 in the list of top 1000 most popular baby boy names. If Johnathan 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 Johnathan!