The term "Raubritter" still echoes even into these times. In medieval [fantasy] stories (and novels), this term is still used to mean a rogue knight, a bamdit knight, one who robs people and caravans just for wealth, or others, because they were outlawed, like the classical Robin Hood. The term "Raubritter" is normally depicting an evil, fallen, bloody knight who goes over corpses, so to say. This term is *never* used for positive meanings, like with the classical Robin Hood. A "Raubritter" is always evil.
The only exception would be if some circumstances show within the course of a story that this Raubritter was originally a good man, and would like to become that again, if certain things are met or achieved. Like repelling a false accusattion of crime. But even then, this person likely wouldn't be called a "Raubritter".
The word "raub" means "robbing", a "heist", a "raid", things like that.
In a children's book of my father, there is a Raubritter with the name of "Plünderegut", which means "plunder well". He is depicted as a cliché of an evil fallen knight.
Goethe made the lower aristocracy knight witzh the name of Götz von Berlichingen a literary figure, even although he actually lived.
One could hardly call him a "Raubritter", because he wasn't realy "evil", even although he was acting within several local wars and feuds.
You can buy and read his life time memoirs even today, in modern form of course.
I did so a few years ago, and it was a both entertaining and interesting read - quite a look into gone times.
en.wikipedia.org