Why Weg is a bad name is explained in the extra story posted for episode 200. It's a word that means "road", which is where Weg was born, and, at least according to his parents, it's bad luck.
It seems the bad luck goes to anyone crossing paths with Weg, instead of bad luck for Weg.
If life gives you lemons, raid your neighbour's village and take the cake life gave *them*!
Yup, weg means road in Dutch and it wouldn't surprise if it meant the same in German
I took most of the orcish names from an old english dictionary, so at least in the more basic vocabulary, I'm not surprised it overlaps with other low-germanic languages.