Erik Lerouge wrote on Tue, Dec 8, 2020 01:54 PM UTC:
For the Rook/Nightrider, you could use Teutonic Knight. It is related to the crusader, which you have already for the Nightrider. (Templar or Templar Knight is also possible, since it's also semantically related; but this name is already used for the augmented Knight in Omega Chess Advanced).
For one of the two first pieces (the Rook/Nightrider or the Rook/Cannon/Ferz), I also thought of Dragoon. The Dragoon is an mounted infantryman who uses horses for mobility, but fights on foot. Since this name is derived from the handgun 'dragon', it can refer to a Cannon-related as well to a Knight-related piece. (And you can obviously use a dragon picture for this piece.)
For the Rook/Nightrider, you could use Teutonic Knight. It is related to the crusader, which you have already for the Nightrider. (Templar or Templar Knight is also possible, since it's also semantically related; but this name is already used for the augmented Knight in Omega Chess Advanced).
For one of the two first pieces (the Rook/Nightrider or the Rook/Cannon/Ferz), I also thought of Dragoon. The Dragoon is an mounted infantryman who uses horses for mobility, but fights on foot. Since this name is derived from the handgun 'dragon', it can refer to a Cannon-related as well to a Knight-related piece. (And you can obviously use a dragon picture for this piece.)