In french, the most common name is probably “beu” which is a contraction of “beuher” which is verlan (a type of slang where you reverse the word) for “herbe”.
This was distorted in a movie to “beuze” , which was then given the verlan treatment again (this happens often) to “zeb”, hence my personal favorite “zebuline”. Mind you, that’s not a common name that’s a personal one I use often.
I would assume the reason is that young disenfranchised males are easy to radicalize into a personal army. Every war lord knows and uses this age old trick.