Need Another Hybrid Name
 

Here's another unnamed hybrid: Ctna. Keith Roth x C. violacea. Can anyone help with the registered name for this cross?

I looked on the RHS orchid finder, and found the name of your cross. It's Cattleytonia Purple Stardust. It was registered in 1988.

Here is the link to the website, if you would like to do other searches. You can either type in parents to find offspring, or type a name to find the parents.
RHS orchid finder

Cattleytonia Purple Stardust
(Cattleya violacea x Cattleytonia Keith Roth)

Thanks, Ladies.