Memory Alpha's "Novels" article has the following statement.
It should be noted that certain publications written by creators of Star Trek's various series are sometimes referenced in later episodes of those series. Somewhat paradoxically, the novels themselves remain apocryphal in such cases, while whatever information was mentioned on-screen becomes canon.
What events, things, or characters first introduced in a publication were later referenced in any of the TV series? (I guess "publication" includes anything written down, like comics.)
This excludes any pre-screen treatments, such as the Star Trek Phase II documents. Since it's Wikia and unsourced it may not be entirely accurate. So "none" could be a valid answer.