Think about it, Nick's mom discussed the history of the Grimms, how they are descendants of the knights who served the seven royal houses. That opens alot of possibilities since from one ancestor you usually have a multitude of descendants. The Grimm were not limited to one ancestor, one heir, in the case of Nick's family, his aunt and his mother were both Grimms. I'm thinking that there are more Grimms out there either willing to join up with Nick or fight him as a result of either serving or going against the Royals. Just think of the variety of Grimm out there, some are probably pure power and others could be pure skill/speed. Your guys thoughts.