Diane Overdiek was a notable comedian.
In 2365, Data attempted to located a comedian to help him better understand the concept of "what is funny?". Overdiek was among the the holodeck program files that were contained aboard the USS Enterprise-D. The program code list for this comedian was EN-54395. (TNG: "The Outrageous Okona")
The comedian was never mentioned in dialog; this name came from a list of comedians.
This character was named after production coordinator Diane Overdiek. (Star Trek: The Next Generation Companion)
For the remastered version of the episode, Diane Overdiek was changed to Steve Wiener.