Vowel dog names are boy puppy names and girl puppy names that start with vowels. These names are growing the most in popularity. Here comes our collection of the coolest dog names begin with vowels such as A, E, I, O, and U. The most popular vowel girl puppy names are Emily, Emma, and Isabella. Boy puppy names that begin with a vowel are not so popular as girl names, but they are more common today, for instance Andrew, Ethan, Anthony, and Austin.