The name Brax is a boy's name meaning "badger". Brax and is often added to user-created lists like Hipster one syllable names.
From the experts:
If you can name a boy Max instead of Maxwell, or Jax instead of Jackson, then why not Brax instead of Braxton? Over 3300 boys were named the trendy Braxton in the US in one recent year, but snappy short form Brax is a newcomer used for only a handful of babies. Brax may feel more popular than that, though, as many Braxtons are called Brax.