Retcon article
(covers information that was retroactively changed)

Burt Armus was a notable humanoid comedian.

In 2365, Data attempted to locate a comedian to help him better understand the concept of "what is funny?". Armus was among the holodeck program files that were contained aboard the USS Enterprise-D. The program list code for this comedian was RN-45432. (TNG: "The Outrageous Okona", okudagram)

This character was only mentioned in writing.
This character was named for teleplay writer Burton Armus. (Star Trek: The Next Generation Companion)
In the remastered version of the episode, Burt Armus was replaced by Craig Weiss.