I don't really see the problem with the Lancknecht in the name. Why not? Yes, it is a name for historical mercenaries and it would probably make more sense to pick some name more related to Germany / Rheinland, but there is nothing wrong from my perspective. Though... if I was making this kind of faction I'd probably didn't use Rheinland in the name and put a name of some... army unit instead. I mean, like Platoon or somethng like that, but in german ofc. But that's just me, you can name your faction whatever you want