Could Koa be the perfect name for your baby boy? The baby boy name Koa is 3 letters long, and contains 2 vowel(s) and 1 consonant(s). Koa is a baby boy name that starts with the letter K and ends in the letter A. The baby boy name Koa has a popularity of 41% and is ranked 587 in the list of top 1000 most popular baby boy names. If Koa 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 Koa!