Amateur Challenge Cup teams split between names

[Max Turner]

- Castleford Lock Lane and Lock Lane is the same club. They are best known as Lock Lane.
- Huddersfield Underbank Rangers and Underbank Rangers is the same club. They are best known as Underbank Rangers.

[Max Turner]

Not an amateur club, but South Wales Scorpions and South Wales Ironmen are the same club. The name was changed to Ironmen for the 2017 season.