Real World article
(written from a Production point of view)

Janet Strnad was a production staff member who worked as the Script Coordinator on the first season of Star Trek: The Next Generation. According to Eric A. Stillwell, Strnad's family were friends of Gene Roddenberry's family, which was how she obtained her position as Script Coordinator on TNG Season 1, but Strnad "mysteriously went on a leave of absence and never came back [....] She disappeared and no-one ever heard from her again." (Information from Larry Nemecek)

The Strnad system was named in her memory. (Star Trek Encyclopedia)