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.
He was wedded to Marie-Anne Boël, daughter of the Vice-president of the Belgian Senate Pol Boël. In conjunction, they had three offspring: Paul-Emmanuel Janssen, Eric Janssen, and Daniel Janssen.