Could Kai be the perfect name for your baby boy? The baby boy name Kai is 3 letters long, and contains 2 vowel(s) and 1 consonant(s). Kai is a baby boy name that starts with the letter K and ends in the letter I. The baby boy name Kai has a popularity of 91% and is ranked 93 in the list of top 1000 most popular baby boy names. If Kai 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 Kai!