Don't know Ceylon or Kotlin except superficial poking around the websites.
So, let me ask you, how is Ceylon better than Kotlin? I'd like to see a good write-up (separate blog post) that compares and contrasts the two. What are use cases where one language would be significantly better than the other?
(Edit)
Wow! Did not expect such a dearth of samples (for both languages) on Rosetta Code.
Given that a strength of Kotlin is that you can dumb-port Java straight to it without even thinking about it, I'm not really surprised it doesn't have much presence on Rosetta Code. It's not the right audience.