Asking for trouble. Rebel Wilson is female, but this name is truly gender neutral, though hardly neutral in any other way. Rebel is undoubtedly one of the edgiest boys' names starting with the letter R.

Could Renegade be the next Maverick? The rebellious meaning and fashionable nickname Ren make it a real possibility.

As a Biblical name, Nimrod appears in the Old Testament as a great-grandson of Noah, a founder of Babylon, and a famous hunter. In popular culture, its image was altered after the dopey Looney Tunes villain, Elmer Fudd, was called "nimrod" by Daffy Duck in a 40s cartoon. It since became associated less with rebellion and hunting, and more with being a fool.

Asking for trouble. Rebel Wilson is a hilarious Australian actress who puts a female spin on this contemporary badass baby name. Still, we think this name is truly gender neutral – though hardly neutral in any other way. Rebel is undoubtedly one of the edgiest girls' names starting with the letter R.

Nimrod appears in the Old Testament as a Babylonian leader, a famous hunter, and a great-grandson of Noah, and while a Looney Tunes cartoon from the 40s may have tarnished its strong, rebellious image in the US, it remains a popular choice in Hungary, in the form of Nimród.