|David Janus Vlekkenbaaij|
|Hair:||black (2292), bald (2313)|
|Relatives:||Enoch Powell, Abraham van Riebeeck (ancestors)|
Vlekkenbaaij was involved in Operation Blackjack in the late 2280's. (Star Trek: Shadowstar Station: Operation Blackjack) In 2292, he was posted to USS Avenger on temporary assigned duty as ship's intelligence officer. (Star Trek: Avenger: "Belonging")
In 2313, Vlekkenbaaij was revealed to be an agent of the Terran Purification League and part of a cell that had killed Andreas Kitabatu al-'Qalb's wife, Laurena Cytrynbaum, and unborn child in 2298. Vlekkenbaaij, Adam Lemuel and their respective families were killed in revenge. (Star Trek: Shadowstar Station: "A Separate War")
Vlekkenbaaij's surname was after Frits Homerus Vlekkenbaaij, a character in Pramoedya Ananta Toer's Anak Semua Banga (Child of All Nations), a novel of the Buru Tetralogy.