He was married to Marie-Anne Boël, daughter of the Vice-president of the Belgian Senate Pol Boël. Together they had three children: Paul-Emmanuel Janssen, Eric Janssen, and Daniel Janssen.
The individual tied the knot with Marie-Anne Boël, daughter of the Belgian Senate's Vice-president, Pol Boël. As a result, they had three children together: Paul-Emmanuel Janssen, Eric Janssen, and Daniel Janssen.