In fact, the name is so unique, most people have only heard it a handful of times, usually referring to Guns N' Roses singer Axl Rose.
As it turns out, their little bundle of joy's name actually was inspired by the singer.
So, are they huge Guns N' Roses fans?
Not necessarily. In a new interview, Fergie explains that the name actually came to her in a dream, where she was seeing the band play and that was the first time her baby kicked, so her and Josh figured it must be a sign.