Could Knox be the perfect name for your baby boy? The baby boy name Knox is 4 letters long, and contains 1 vowel(s) and 3 consonant(s). Knox is a baby boy name that starts with the letter K and ends in the letter X. The baby boy name Knox has a popularity of 76% and is ranked 236 in the list of top 1000 most popular baby boy names. If Knox 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 Knox!